One of the highly touted features of the new iPhone is the ability to have the map display your direction of travel. A great idea, long overdue. As people were walking out of the Apple Store today it was one of the first things some people wanted to try. They brought up the Google Map app, and then started spinning around. But these whirling dervishes weren't getting anywhere.

Since I was the real smart TUAW dude, I told them I could get it going. Nope. Nada. Zero.

After a bit of a search at the Apple web site when I returned home, I found it. You have one more tap to do on the map. When you tap the location icon at the lower left of the map screen a second time, it changes to a new, previously unseen icon. It looks like a little wedge in a circle. When you activate it, you're good to go. Or spin.

I think if I were designing this I would have made it an option on the map to default to direction of travel, or North at the top. Oh well, nobody asked me. Not the most obvious GUI design, but I guess once you know it, you know it. Now you know it too.

Yesterday I tried to open up iPhoto '09, and was greeted with a screen telling me that my iPhoto library needed to be updated. This was sort of odd, since I had run the program many times since the software update of June 4th bringing the program to version 8.0.3, but what the heck. I clicked on upgrade and the program crashed displaying one of the wonderfully unclear error screens of hex numbers.

After trying all the usual things like rebooting, resetting the PRAM and saying 'Candyman' three times in front of a mirror, I sheepishly gave up and called Apple. It turned out that this has been happening to many people. Up until two days ago, Apple had been capturing reports to find the source. I was told that they stopped capturing reports when they numbered around 3,000.

What Apple found was a bug in the 8.0.3 updater, and apparently the bug could bite just about anytime since it didn't necessarily rear its head directly after the update. The bug, in various incarnations with various solutions, is to be cursorily found in the support forums, but here is the authorized Apple fix:

Hold down the option key as you boot iPhoto and you'll see a screen like the one displayed here. Just choose your library (there should only be one) and iPhoto will boot normally. Problem solved! As of now the problem hasn't resurfaced for me, and according to Apple tech support, it shouldn't. This bug will be squashed in a future iPhoto update but for now it's easy to get around.

Problem: Some piece (or pieces) of rogue software have cluttered up your Open With contextual menu, which you can see by right-clicking or control-clicking any document in the Finder. This problem seems to be most prevalent with virtual machines that allow you to open documents with Windows applications, but tend not to clean up after themselves. After having both Parallels and VMWare installed on my MacBook Pro, my Open With menu was a mess.

Solution: Lucky for me, I noticed David Chartier's question about this on Twitter around the same time as I was wondering what to do about it. Some friendly person pointed him to a posting on Apple's discussion forum (also noted on Mac OS X Hints here and here), noting that running a specific command in a terminal window will rebuild your launch services, which repopulates the Open With menu with a current list of applications, without duplicates. It worked perfectly for me, but beware, on my system it took about 10 minutes to complete, and I suspect it could take more on a sufficiently gummed-up system.

Here's the Leopard version of the command (the path to the tool is different in Tiger, see here). I broke it into three lines for readability, but the \ at the end of the line is bash-speak for "keep on going with the same command" -- you can copy and paste it directly and it should work, or if you type it on one line without the backslashes, it will also work fine.

/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/\
 LaunchServices.framework/Versions/A/Support/lsregister -kill\
 -r -domain local -domain system -domain user 

If, preferring to avoid the Terminal, you want a handy GUI app to rebuild the Launch Services database with a couple of clicks, check out Titanium's OnyX or Maintenance utilities, both free of charge.

A couple of weeks ago, I was on a two-day business trip to Kansas City. As usual, the moment my plane landed I turned on my iPhone and gave my wife call to let her know that I had made it to my destination safely. I told her I'd text her as I got my rental car, and then call when I got to my hotel.

Heading out the door of the terminal to catch the rental car shuttle, I reached into my pocket for my iPhone only to find that it was gone. I did a quick search of my other pockets, my briefcase; anything within reach. Nothing. The next step involved running back into the terminal, talking to the folks at United to see if they could have someone check my seat on the airplane. They did, with negative results. I gave them my name and home phone number so that they could call me if it was found on the airplane when the cleaners did their job, and then I headed on to collect my rental car and go to the hotel.

The next morning, I called the lost & found office at the airport, and nothing had been turned in. Since I depend so heavily on my iPhone for my work, I ended up going to the nearest AT&T store to buy another phone. Read on to see what I learned from this experience.

UsingMac has posted an exhaustive look at iTunes from the perspective of making your working life better. From basic tips like shuffling songs and shuffling movies to more advanced tips like using Terminal to set a half-star rating, it's well thought out.

My favorite tip involves browser mode. Many people (in my experience at least) overlook this feature. I find it to be a killer way to categorize and find just what you're looking for, across genres, years, styles, etc. Of course, I'm that annoying guy who gets all excited over tags, charts and graphs, so keep that in mind.

Check out the article and feel free to share you own.

Since I often listen to music while falling asleep (especially on trips -- maybe it makes me feel more at home), I was happy to see this tip, sent to us by reader Mark S. He points out that there is a sleep timer on the iPhone, but it's not in the iPod app. It's hidden over in the Clock app -- once you've got your music playing, you can then exit out and go over to the Timer app in there, and under the "when timer ends" option (where you usually choose a ringtone), you can choose the "Sleep iPod" choice.

Then, when your timer stops (and you're off into dreamland), it'll stop the iPod for you. Very nice. Of course, there's still the issue of headphones, if you're wearing them, but I usually am able to push those off in a fit of dreamless sleep (or, of course, you could just use the external speaker on the iPhone).

All of the sleep tunes, much less worry. This tip's been going around for a while, but it's the first I'd heard of it. Thanks, Mark!

Once again, it's time for another edition of Ask TUAW: the place where we try to answer all of your Mac and Apple-related questions. This week we're taking questions about recovering pictures from corrupted compact flash cards, Twitter for the iPhone, extending iPhone battery life and more.

As always, we welcome your suggestions for this week and questions for next time. Please leave your contributions in the comments for this post. When asking questions, please include which Mac and which version of OS X you're running. If you don't specify, we'll assume you're running Leopard on an Intel Mac.

Okay, let's get to it!

Nick F. asks:

I've got some pictures I need to recover from a corrupted Compact Flash card. What's the best, preferably free, software to do it on my Mac?

This is one of those questions that can get frustrating if you're a Mac user. On the Windows side, there are a few good (and free) pieces of software that can help you accomplish this task. For the Mac, you're choices are mostly limited to pay applications -- at least if you want good results. Fortunately, these pay applications are very good.

For my money, the piece of software that works best when you want to recover pictures from a bad CF or SD card is Klix ($29.95) from Joesoft. I've used it quite a bit with clients, and on my own bad cards, and each time it performed flawlessly, recovering every lost picture from the card. Other alternatives for the Mac include CardRaider ($19.95), PhotoRescue ($29.00) and Data Rescue II ($99.00).

I realize that $29.95 for a piece of software might seem like a lot to some people. But if the software is easy to use and works as advertised, I think it's a worthwhile investment in the long run. Besides, it would cost far more to go back and take those vacation pictures you lost on the card again when you could buy Klix and recover them from your bad card instead. Given that, a program like Klix is actually a bargain.

If you've got Windows running on your Mac (either through Boot Camp or virtualization) and you've had good luck with one of the tools from the other side of the fence, let us know in the comments.

Here's a useful corner of Apple's enormous website. The "Find Out How" pages feature tutorials on things like Mac and wireless basics as well as web, music and MobileMe tips.

We've written about it before, but Apple has recently added tutorials for iLife '09 apps, including iPhoto and an iLife '09 overview. The tips are super handy, and even an old salt like me learned something new. For example, did you know you could publish to FTP with iWeb? I didn't (of course, I never use iWeb).

Of course, you can check out our own Mac 101 series as well. Here's to education!

You know from reading a lot of my earlier posts that I am a real fan of iPhone GPS apps. I regularly use RunKeeper, TrailGuru, and Geocaching to keep track of my wanderings or find geocaches, but I've found that those apps usually suck my iPhone batteries dry very quickly.

Jason at FitnessKeeper let me know that one of their forum users, Valter, had tweaked various settings on his iPhone and was able to get a tremendous amount of battery life while still keeping both the iPhone's A-GPS and EDGE connection active. Those are the requirements for most GPS apps. What were Valter's secret settings?

• Wi-fi: off
• Push: off
• 3G: off
• Bluetooth: off
• Brightness: set at minimum (Note - I also turn off Auto-Brightness)
  
• iPod: off

Your mileage may vary, but the RunKeeper forum users found that they were able to improve battery life drastically. One reader had 70% of battery capacity after a two hour run with RunKeeper tracking his run, while Valter's personal tests showed 50% capacity after a 2 hour 45 minute run. For other GPS apps like Geocaching, your battery life will most likely be less as brightness will need to be set so that you can actually read the screen.

What are your optimum iPhone power settings for uses other than GPS apps? Leave a comment below.

You can create some wonderful visual effects with Keynote '09; good enough, in some cases, to make experienced After Effects artists say "You did that in Keynote?!," which is always very satisfying. Despite Keynote's power for presentations, there are a few things that it doesn't do natively -- play video during a transition, for instance. Fortunately, some of these tricks can be accomplished by a long-honored approach known as "faking it."

If you have a video playing in the background of a slide while you trigger a dissolve transition to the next slide, ordinarily you'll see a distracting freeze of the video playback as the transition effect runs. The way around this, usable for many (not all) slide transitions, is to pull the transition forward into the slide with the video.

I do this by grabbing a screenshot of the initial state of the next slide, and then do a build-in action to dissolve (or flip, or what have you) that screenshot into the slide that's playing the video, above the video. The video keeps playing behind the screenshot as it dissolves in, and then you can gracefully move to the next slide, invisibly or with a dissolve -- the placeholder screenshot and the slide should be indistinguishable. In practice, this works better with a fade through black or a solid color than with a slide graphic, as the alignment can be tricky, but if you play around with it you can get it to work well.

Sounds confusing? Allow me to demonstrate with a brief screencast in the 2nd half of the post. You'll see the "vanilla" transition including the video freeze, and then the fake transition that's done by dissolving a full-screen graphic in over the video as it plays. (The video clip is my poorly-shot night line cinematography from the opening of the NYC 14th Street Apple Store.)

Updated to clarify that the process uses a build-in action, not a transition.

Coming up soon: my favorite Keynote trick for visual fireworks.

Ivan at the great Creative Bits has posted a nice tutorial on creating animated charts in Keynote. It's a simple process really, making use of the build feature of the Inspector. You've got to love Keynote. Even a person who dislikes slide shows (like me) can enjoy putting one together.

If you're after more powerful chart and graph options in Keynote, check out Chart Gallery. For even more Keynote fun, you can't miss Keynote User or our own first look at Keynote '09.

Many websites and services offer great mobile versions without being packaged in an App Store application. If you want to be able to quickly access these sites from your home screen, follow these steps:

1. Launch Safari on your iPhone
2. Browse to a desired mobile site (most sites will automatically redirect you to the mobile version once they determine that you're using an iPhone)
3. Click the Favorites (+) button at the bottom of Safari
4. Click "Add to Home Screen"
5. Type a name for the icon that will appear on your home screen
6. Click the "Add" button

You will now see an icon on your home screen that will launch directly to the mobile website. Since I'm headed to Washington D.C. next week, I found this handy for the Metro mobile site and the Allpoint ATM search site.

More Mac 101, our ongoing series of tips and tidbits for new Mac users.

Update: As the comments point out and Low-End Mac confirms, support for USB booting was present in the Mac OS 9 era with the introduction of dual-channel USB in 1999, available first on the slot-loading iMac and one model of the AGP PowerMac G4; however, your mileage and performance may vary when trying to get these machines to boot Mac OS X from USB devices (as has been previously reported on TUAW). Our apologies for the error!

When I wrote my post Tuesday about booting a Mac off an external USB hard drive, I was surprised how many people followed up to tell me that it wouldn't work, and that I needed a Firewire drive to externally boot a Mac.

While [much] older machines did indeed need Firewire for bootable external media, that is no longer true. Since the release of the Intel Mac computers [and well beforehand -- see update above], and with Mac OS X 10.4.5 or later, you can start up from an installed system on a USB hard disk. Here's the Apple support document that tells you how to do it.

I didn't think it was possible either, and when I bought my MacBook Pro last year, I was wishing I could boot from a USB drive because of the easy availability of inexpensive storage. A little online research revealed the obscure truth. USB booting generally works fine from a bus-powered portable drive as well as a powered USB desktop drive. In my case, I booted up just fine from a portable with no external power supply. Check the support document linked above for more details.

So have at it -- either install a clean version of Leopard or Tiger on the drive, or use your favorite bootable-backup utility to clone your existing install to the USB volume. It's a good thing to know as Apple seems to be determined to bury Firewire on the lower priced laptops it sells.

It is also possible to boot an Intel Mac from a USB flash drive. That is a bit more involved, and there are several methods. One is Das Boot, a free utility from Sub Rosa that allows you to convert original disks from DiskWarrior, Drive Genius, TechTool Pro and others to a flash drive. Let Google be your friend on this. Many people have put their favorite rescue utility on a bootable flash drive to save them from any problems in the field.

Before you ask; no, USB does not support target disk mode -- a sore point for MacBook Air and unibody MacBook owners.

Thanks to Dave and others who wrote in asking about this, and thanks to many readers who wondered about the ability of older PPC Macs to do this as well.

Perhaps you are a web developer, or maybe you're just nosy. Either way, looking at certain websites' CSS, HTML, and Script documents can be fun. If you are a Safari user, you can easily look at the loading documents in the Activity View (Window > Activity), but what if you want to take this a step further? You can with the Safari Web Inspector, and you can do it by enabling the Safari "Develop" menu.

To enable the Safari Develop menu, just close Safari and type (or copy/paste) the following command into Terminal.app (/Applications/Utilities):

defaults write com.apple.Safari WebKitDeveloperExtras -bool true

Once you enter the command, you will be able to launch Safari, load a webpage, and click Develop > "Show Web Inspector" to see the page attributes. You will be able to see the documents, stylesheets, images, and scripts.

Update: As of new versions of Safari, you can enable the Develop menu by going to Safari > Preferences > Advanced, and click on the "Show Develop menu in menu bar." Thanks to everyone in the comments for pointing this out!

Want more tips and tricks like this? Visit TUAW's Terminal Tips section today!

The blog Tap Tap Tap has posted a wonderful list to 10 iPhone tips and tricks you should know, including taking a screenshot (here's our how-to on that trick), enabling caps lock and customizing the home button's function. Definitely check it out.

While we're on the topic, here are a few of our own favorites

• The homescreen shortcut in firmware 2.2. With a click of the home button, you can jump to your first home screen.
• How to enable passcode protection. It's bad enough that you left your iPhone at the post office. At least the shmoe who finds it won't be able to call China.
• Pause an application download. Because sometimes you just don't have a free 90 seconds.
• Go Geocaching with an iPhone 3G. Who needs an additional GPS device?

Is your favorite trick not on either list? Let us know!