i was using ubuntu 12.10 on my hp laptop v3000 series having 1GB ram and it was working fine. But when i upgraded to Ubuntu 13.04 , i saw a few display error.
Error 1 : My unity shutdown dialog box shows a small square box of a darker color of whatever color is my unity theme . its a small square box near the corner of the shutdown Dialogue Box.
Error 2 : My unity search dash is showing the same error in the corner and another error, whenever i hover from one point to another in the unity dash it shows some dancing lines and color. i mean it shows color change when my mouse cursor moves.
Here is the screenshot to the problem