If a user has associated their account with another service (Twitter, Facebook, etc), and they have "View your identities" setting set appropriately in Privacy settings, then should those accounts display in their Profile, within the Information tab?
If so, I'm unable to get this to work.
Similar to this thread (except I have tried on the default style and it still does not work):
(I have also tested with all add-ons disabled.)
I have tested a few member's profiles who have associated their account (including ones which do have the "View identities" setting checked), and none show this information.