As i said in my original post i use the original Nvidia driver from their homepage, and why should it change over night when i have used the same driver for god know how long.
And i haven't messed around in any config files, i am not an newbie on linux, i had it for years and i havent seen this problem at all before, although it may have something with my (graphic card) speed settings maybe?
Oh yes one more thing, it is the same in console mode but much much less visible, a small streak to the sides when i use Midnight Commander.
I want to be sure if it is the card or possibly some setting or anything that had gone wrong after all this time...
Thanks for any more information about this subject.