Font characters have weird colored pixels at the edges
I've installed Ubuntu Studio 12.04. The installation was flawless and everything seems to work, but as the title says... All the characters have colored pixels at the edges.
There is no problem with icons or images, those are displayed normally.
I was told, there must be a problem with xorg, but I don't know anything about how to xorg modification...
I hope someone knows how to fix this.. It is really exhausting to read as it is now...
Thank you very much in advance,