There is that new issue with Flash that sounds like you encountered. Google this -> DISABLE FLASH HARDWARE ACCELERATION
Yes it points to a bug in the graphics driver but GOOD LUCK in getting that fixed.
I have a hp pavilion a 1410y pc desk top that uses ati radeon xpress 20 series graphic driver. I checkd for updates an that was ok. Hoever when i run a video the computer shuts down and microsoft says i have a graphic driver problem. Am i able to buy that hard ware ad replace it or do i need to take it into a geek? lol Please advise