IE, Q9550 Quad Core, 4GB Ram, 9800GT graphics card...
I'll look into the sound card drivers...
In IE. Good point though, I just tried Chrome and it seemed ok. Will try some longer videos tomorrow to see...
It's probably your version of Flash (unless it's on Silverlight...). You can try the 11.2 RC at
labs.adobe.com. It has a lot of reworking of the video pipeline...