User Profiles and the User Information List are two different data stores. Basically, the UIL is what you use in SharePoint Foundation. Every Site Collection has its own UIL which contains every user that has "touched" the Site Collection. If you have the User Profile service running, then you also have the User Profile store. You can enable the User Profile service separately from My Site, though the latter requires the former.
If the Site Collection doesn't have a healthy UIL, then there is something seriously wrong with it.
M.
If the Site Collection doesn't have a healthy UIL, then there is something seriously wrong with it.
M.
