Blurry guides and transform controls

Hello, I have an iMac 24 with ATI Radeon 2600 PRO. And I'm having this problem.



Screenshot: http://tinyurl.com/bykd2l



Anybody knows how to fix it?



Thanks in advance!
Blurry guides and transform controls
Try disabling Open GL.
Blurry guides and transform controls
Oh! I tried that a hundreds of time with no luck, now I did it restarting Photoshop and problem solved. Silly me.



Offtopic: So, what the Open GL is good for?



Thanks!