Could be a GPU problem. Does the issue happen once you boot in or does it come whenever? Did you try a new user? If you've tried troubleshooting within the OS, then you might have to do a reinstall and perhaps running the Apple Hardware Test and see if any errors come up.
I'm having the same issue with graphics. Any time i try to use the image adjuster in iWork, my images do funky things, not to mention, the changes come quite slowly.
Here is a clip:
Macbook Penryn, same problem here. Solution? Uninstall flash player...
I have the same problem here. My Macbook Penryn start to do this two or three weeks ago. This issue isn't only related to Safari.
When I read the rumors that apple is creating your own version of flash player, I have the intuition that this issue with display can be something related to Flash.
When I read the rumors that apple is creating your own version of flash player, I have the intuition that this issue with display can be something related to Flash.
FWIW, QuickTime has built-in support for an older version of Flash. This allows a lot of Flash content to play in your browser without your having to install Adobe's Flash plug-in.
That said, rumors are rumors. Apple is struggling to eliminate Flash. It is not trying to clone this defunct technology.