Urban Giraffe Support

I know this isn't support for the TweetMeme plugin (their support actually says to look at your redirection plugin first!) but it was working before the redirection plugin - and still works for non-redirected urls - but doesn't work for redirected urls.

My redirection is relatively simple:

I redirect
from: http://mydomain.com/dir1/dir2/post-name/ using /dir1/(.*)
to: http://mydomain.com/dir2/post-name/ using /$1

Has anyone else dealt with this? Any thoughts or recommendations? Thanks in advance!