Yep, still happening to me as well. 10.8.3 hasn't fixed anything. I must leave Graphics Switching off in the System Prefs or deal with the garbled text and images in Mail and Safari. This of course causes rapid battery drain.
Come on Apple. Enough already.
Late 2011 MacBook Pro
Processor 2.4 GHz Intel Core i7
Memory 4 GB 1333 MHz DDR3
Graphics AMD Radeon HD 6770M 1024 MB
same problems with my MacBook Pro 15'' Early 2011 i7 2.3 GHz Hi-Res Antiglare Display SSD Kingston HyperX 240GB 2*4 GB RAM.
An Apple authorized service center already replaced 2 times my logic board but problems are still here. :-( It's clear it's a software problem.
I have these issues with OS X 10.8.1, 10.8.2, 10.8.2 and Safari (6.0.4 too) and Mail.app. I attach to you some examples.
I think it could be a good idea report the issues in the page http://www.apple.com/feedback/macosx.html linking the report to this discussion. Then, we only gotta hope!
If you find a solution to this problem, please post it here. Thanx.