this explains everything!
I have had so much trouble with certain sites bogging down my high-end computer. I have broadband and 768MB of RDRAM - I should never have a problem viewing sites, but I have encountered a few new Flash 6 sites (mostly FlashKit members' sites) that simply make my browsing experience unbearable.
I am so glad that all of you diagnosed this, and I now wait for MM's response. I too have never been one to bash MM - I am maybe one of their biggest fans, but this just sucks. They should be ashamed that a bug this big slipped by them.
I have reported it on their bug mailer just as many of you have - hopefully this will allow us to garner a rapid response.
Thanks again to all of you that spotted this.