I checked out a user profile and see what is happening.
Before the import, the URL in a user profile is:
http://www.mydomain.com/ubb/Avatars/avatarfile.gifAfter the import, the URL becomes:
http://www.mydomain.com/home/ubb/Avatars/avatarfile.gif
The insertion of "home" is the problem.
Anything I can do to prevent that before I run the importer again?