IE breaks after three flash videos!

IE 6 and 7 on ANY computer breaks after clicking on a third flash video on my
site. After the third video, all navigation is disabled and it seems like the
videos are still downloading in the background, even once I've tried to
navigate away. I have to close and reopen IE to get the site to work again. I
don't have this problem in any other browser.

Flash plugin is up to date
I've tried launching flash videos from the .swf and from .html files and it
makes no difference.
I tried moving the swf out of the body of the web page, and even navigated
directly too it and it made no difference.