Gitorious generate my Gravatar from the email address that is part of the commit. I can run git log in my repo to see the email address that specified for each commit. Make sure you have a Gravatar for each email address that you use to commit with because I got some problems recent with it and my commits was did from two diferent e-mail address. I fix it today, and here is how can you fix it for you too.
To fix my email when committing in git globally, I did (please, ignore NOSPAM markup):
[~]$ git config --global user.email crncostaAT@NOSPAM@gmailDOTcom
You may also need to check your Gravatar account (Gitorious account) to make sure your Gravatar is aasociated with that e-mail.
If you wish to set this on a repo-level instead of a global one:
[~/path/to/repo]$ git config user.email crncostaAT@NOSPAM@gmailDOTcom
This change will only effect future commits. Your past commits will retain the old, incorrect address 
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