I thought I would add, that I just came from the FaceBook website. When I clicked to log-out, it took a good minute or more before it would do anything. Then it showed me the FaceBook home, which appears after you log-out. And then a small gray window popped up:
Warning: Unresponsive plugin
Shockwave Flash may be busy, or it may have stopped responding. You can stop the plugin now, or you can continue to see if the plugin will complete.
Continue - Stop plugin
First time I have ever had that warning.
Just thought I would let you know.