Well, this appears to be a real bug in 1.11pr1 ? 2.x. When doing a database query I would occasionally get an authentication challenge. It was always the same query. If I cancelled the challenge, I got an error message saying that I was not allowed access to RRP, which was one of the fields in my query. Now this was the same bug that Butch Landingin was getting in his SquishDot product which he solved by replacing all NULLs in the TinyTables he was using. I therefore did the same. I removed all NULLs from my RRP field, and now the challenge has disappeared. So, in short, when anonymous queries a table which returns a set containing nulls, Zope mounts an authentication challenge. ------- Regards, Graham Chiu gchiu<at>compkarori.co.nz