After a few days with nothing to report, the graphics "glitched", again, this morning. Conditions were the same. It happened upon waking from sleep and when the integrated GPU was active. Toggling gfxCardStatus corrected it.
Send Apple feedback: http://www.apple.com/feedback/macosx.html
Here's the report that I submitted:
Hello,
I have a mid-2010 MacBook Pro (2.53 GHz i5 model). A week ago I upgraded my OS to Mavericks. On a couple of occasions, I have noticed graphics glitches. In my case, the glitches have occurred upon waking my computer from sleep and when the integrated GPU is active.
Please peruse the following support discussions to see the issues that myself and other users are having:
https://discussions.apple.com/thread/5468958?start=0&tstart=0
https://discussions.apple.com/thread/5491143?start=0&tstart=0
The issues I've seen are present in the screenshots that several users have posted. In my case, I have seen a corrupted "shadow" effect around the outside of open app or finder windows. Several Dashboard widgets have appeared to be glitchy with lines or "static" in the graphic. I have also noticed that the names of apps in the Dock appear as a "static"-like noise and are unreadable when moused over.
I use the menubar app called gfxCardStatus which allows for easy switching between the GPUs. If the graphics problem presents itself, simply, toggling between the GPUs is enough to correct it. Based on others who have posted in the support forums, disabling "Automatic Graphics Switching" in the Energy Saver preferences also appears to correct the problem.
Graphics glitches are a hindrance to anyone's workflow. I wanted to bring this to your attention (as others, surely, have). I'm hoping a fix is on the way. I appreciate your diligence in resolving this issue.
Thank you.