Apple ships fix for file URL crash bug
support.apple.com
support.apple.com
Ever since Safari 6 came out, I've been having a problem with display errors. I have a late 2010 MBP, and it only occurs on that computer and when on the Intel graphics. On sites would manipulate the DOM in certain ways (expanding/hiding comments in Reddit, new fields appearing when you fill out existing fields in some sites) you could see things transition but at the end of the update/animation a rectangle of old content would still display.
It was some sort of rendering GPU bug, and it was horribly obnoxious. Reddit was where I noticed it most. Once it happened, re-opening/closing the comment wouldn't do anything because OS X/Safari seemed to cache the result. The only fix was to either switch to the nVidia GPU or to zoom the page in a little bit (to force a re-render) then back out.
But I installed the update a short while ago and I haven't seen it yet. I hope it's fixed, I was starting to consider switching browsers.
Too bad Safari's inspector is still the same terrible one they introduced in 6 and not the good was that was in 5 (and is still in Chrome). I don't know why they decided to change it but it's terrible.
I have the same issue, also only on Intel graphics, but it would only manifest itself after a sleep/wake cycle. So try that. I'll try installing this update too, I hope it fixes it.