I’m having the same difficulty. I’ve read the threads around the Warning: Cannot modify header information - headers already sent by ... error. Most of those involve wp-config.php and suggest that there is probably extra whitespace at the beginning or ending of the file. That doesn’t seem to be the case with wp-db.php, and I don’t see anything particularly strange about line 102.
I don’t get Unknown column 'display_name' in 'field list', I have Duplicate entry '0' for key 1 instead. I also have similar errors when trying to modify the profiles of existing users.
Anyone?
