Safari 5.1.5 update fixes issue when running in 32-bit mode

Software Update just alerted me that Safari 5.1.5 is available. As noted on the screenshot above, the only information from Apple was that the update "contains a fix for an issue that could affect website usability when running Safari in 32-bit mode.
The update is small -- only 46.4 MB -- and does not require a restart.
Share
Deals of the Day
more dealsSoftware Updates
more updates- Poser 10 and Poser Pro 2014 available, bringing new characters, physics and more
- Agile Partners releases Lick of the Day 2.0
- Google announces new Hangout app to hit iOS today
- Microsoft Office for Mac 2011 Update 14.3.4
- Pixelmator 2.2 available with over 100 new features and improvements
- DabKick for iPhone lets you share photos, watch videos and now listen to music in real-time