I don't know why it started doing this, but its really annoying when watching YouTube, Hulu, and Netflix. The top menu bar just stays there. I've updated everything, and its still there. How do I get rid of it? EDIT: I figured out the problem. I was using the pre-release version of Flash that does hardware acceleration on OS X. Uninstalled that, installed the 10.1 from Adobe's site, and everything works fine now.