Pixelated images in safari, please help.

Hi everyone,
Hoping someone can help me with a issue i have with my new macbook pro.
When browsing the net, safari and firefox show really pixelated images. I thought it might be my internet connection compressing data or something, but i have tried other computers on the same internet connection and the images show perfect...
So this makes me think its the macbook. I have upgraded snow leopard from 10.6 to 10.6.2 and updated safari, but unfortunately this didnt help my problem. So now i have ended up here, asking you people, coz im out of ideas.
I will include some screen shots so you can see exactly what i mean.
Notice the bad quality images and even on google's banner it is pixelated heaps...
Please help if you can. Its very annoying. Cheers.

screenshots
http://i134.photobucket.com/albums/q93/Bonustokin/randon/Screenshot2010-02-13at1 00814PM.png

http://i134.photobucket.com/albums/q93/Bonustokin/randon/Screenshot2010-02-13at1 00814PM.png