Flash player/Opera/Mozilla problem. Choppy video

Hello.

I think I got a problem with flashplayer... I cant figure out how to fix it though...

Ive been using the Opera Browser for years and it works quite nice for me, but I just got a new computer and Opera has some issued when viewing flash movies (like the once found at www.noob.us) or some website ( like tvtorrents.com). Not that it isnt always bad, only on some pages. The only "common element" I have found is that noob.us and other videosites i look at use JEROENWIJERING Flash Video Player. (If you rightclick a movie you see the info about it). This is a server option though, and havent given my opera any problem on other computers.

When i enter those pages, my browser starts chopping really bad. Low FPS, the mouse moves only once a sec and so on. Movies cant be watched because sound and picture is to choppy. This ALSO happens with Firefox, but works just fine in Internet Explorer.

I also notice that watching a movie on noob.us takes my opera/firefox to 50% CPU (C2D e4300) while IE keeps it at 10-15%.

I have tried reinstalling browsers, reinstalling flash, rebooting and so on.