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How about Admin > Preferences > Extended Profiles > General Settings. At the bottom, the last setting is "Allow to view account" with the 3 choices to the right. Make sure that it's not set to just Webmasters.
"Individual fields can be set visible or invisible to users in fields administration,
but if you want to allow access to other users' accounts for certain groups only,
while still allowing anonymous users to register,
select the groups here."
Hope this helps.
Regards,
JP