Flash gets progressively slower until it is unusable

view full story

http://askubuntu.com – With chrome open I can watch a video on youtube. At a certain time from watching it, the video gets slower. You can see the video and sound slowing. Eventually it gets so slow that it just stops all together. I have tried this with firefox also. I have an ATI graphics card and installed the proprietary drivers. I have also downloaded extras for chrome from the recommended section of system update. Why does this happen? Is it the graphics card or its drivers? The video that I am playing is not full screen. I am currently using Xubuntu and it seems that my intel chipset laptop with (HowTos)