I have a problem with the dash's background in Raring, instead of blur it shows a greenish pattern. This happens with both active and static blur (installed Unity Tweak Tool to try these). No blur works well but it is confusing, it makes everything hard to read.
I have an onboard ATI Radeon Xpress X1250 graphics card. I haven't installed closed source drivers (none of them show up in the Additional Drivers section of System Settings).
The launcher and the panel also have this problem but only when the dash is open, otherwise they are fine.
Precise and Quantal work fine, I only face this problem in Raring.
Is there anything I can do to fix this other than revert to Precise?