Does anyone else have this problem?

When I watch any Youtube video in full screen mode, the framerate lowers quite a bit. I'd say it's roughly 10-15 FPS. When I watch the video in the default window or "theater mode," the framerate is fantastic. Really smooth.

I've found some discussions of this online, but I can't tell if they're talking about the same issue, and none of the suggestions I've found there work anyway (turning off hardware acceleration makes all video playback bad).

This is in Chrome in my main computer, which should have plenty of power to play back at a high framerate.

I've tried IE, and the problem doesn't appear to be there. It's definitely not in Firefox. I really don't feel like switching browsers.

Any ideas? Has anyone else seen this?