'Marble' to be the next look-and-feel for Mac OS X?

Snow Leopard, the next major version of Mac OS X, will include minor tweaks to the user interface, according to MacRumors' Arnold Kim.

"The new theme will likely involve tweaks to the existing design and perhaps a 'flattening' of Aqua in-line with Apple's iTunes and iPhoto interface elements," Kim writes.

AppleInsider's Kate Marsal posted a screenshot of some controls purported to be part of the new interface, dubbed "Marble." It's unclear where the screenshot came from, as Kim writes that development builds have so far used Leopard's version of the Aqua theme. They could easily be Photoshopped screenshots of iPhoto or iTunes, so take that with a grain of salt.

Daring Fireball's John Gruber wrote that Marble was the codename for the new interface scheme in his Macworld predictions roundup, but said later he was wrong when it was not announced during the keynote. He wagered that the look would feature "iTunes-style scrollbars everywhere, darker window chrome, and a light-text-on-dark-background menu bar."

Snow Leopard is rumored to be released before the end of March.