Do you mind updating the achievement frame skin? they added a few things to the default ui for Achievements with the patch. Also, in SexyMap I use the Blizzard Tooltip Border texture as the border for my Minimap, but it doesn't get converted to the border you use for the majority of skinner. Would it require a skinning of the addon itself on your part (if so, I can deal with it, don't want to hassle you) or could I point it at a particular texture in the skinner files to achieve the same look?
there seems to be some bug in the OverAchiever skin. I'm getting this message in chat (Skinner: Error running Overachiever_Tabs Interface\AddOns\Skinner\Skinner.lua:1046: attempt to index local 'slider' (a nil value)) and also couple of errors in BugSack (http://wowace.pastey.net/106989. If I remove the OverAchiever skin from SkinMe, the addon loads without any problems.
The version of OverAchiever I'm using is 0.31.
I had to change all instances of Overachiever_SearchFrame to Overachiever_SearchFrameContainer and Overachiever_SuggestionsFrame to Overachiever_SuggestionsFrameContainer to get it to work with the latest version of Overachiever.