Oh, dear, I'm sorry... I looked at the database through phpMyAdmin and I just realized what that SQL query was checking. I thought maybe the UBB interface was returning '0' to indicate '0' records, but now I see it is the value for the U_Banned field for that record.
In fact, the original query did find the user and returned '0', meaning, I presume, that they aren't banned.
Sorry for the temporary mis-lead there!
Tracy
