I happened to notice tonight when I logged into Digg that it showed on my profile quite a bit of information. Alot more information then I wanted seen in the open not to mention it snagged my default picture from Facebook. You can now link your Facebook and Digg account together. Now at some point did I link mine? I'm not really sure but I don't remember doing it. I do use the same email for my facebook as I did on Digg.
Anyways check your digg account and then you can edit what you want to show. Click on your Profile name up top:

Then click on the "settings" tab and you can then edit what you would like to show and not show:



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