A fellow user came across a problem, and it's the exact same one that I'm having. I'm just reposting here to see if there's a faster response ([original Ubuntu Forums post](http://ubuntuforums.org/showthread.php?t=1863514)):

> 
> So I have upgraded to oneiric and I was excited to get gnome 3 and so
>  i did and it's great, but in the applications menu many of the icons
>  are showing double, which is strange. One will be clear and the next
>  will be pixely. Also, this only happens when I'm in the "All"
>  category, and with the Faenza icon set the pixely one is not in the
>  Faenza style. I'm not quite sure how to fix this problem and I need
>  some help.
> 
> 
> 

A Google search turns up mostly closed Fedora-related bugs, so I'm not sure what I should do to try to fix this. Any help would be greatly appreciated!