hook_user should not return anything for $op='view'

The return value of hook_user when the operation is 'view' should be none (at the moment it is returning an array that is left over from D5)

See:
http://api.drupal.org/api/function/hook_user

This was causing a warning to appear at the top of a users profile page when using panels 3

Easy fix - just remove one line.