Do these two lists have a syncing mechanism? I know of the User Profiles being synced via your data store, but does the User Profile sync with the User Information List? If so, what settings drive that synchronization?
I've found this link: http://social.msdn.microsoft.com/Forums/en/sharepoint2010general/thread/c69069af-9422-436a-9ac8-8f996291de03 And also a contradicting link: http://blog-sharepoint.blogspot.com/2010/08/user-information-list-not-synchronised.html
Which one is right?