I asked this on ubuntu forum's but no help yet so I'll post here too.
First pic was from before format and reinstall, 2nd after. Basically white line appears at random places, like on first pic or next to Show Desktop icon, and some stuff gets messed up like in 2nd pic. On 2nd pic, I couldn't press that messed up thing, or what's behind it(shut down, restart etc), while thing next to it I could.
Also this happened after 2nd restart, first it was working fine but after I installed some applications(many from first page) and restarted this happened.
It's very likely some app is causing this so if anyone has an idea how to troubleshoot this it would be great.
I would start uninstalling what I installed but I don't remember everything, is there like a list somewhere of most recent stuff, or what I installed myself rather then getting huuge list in synaptic?