[snip] > even is that is true i think you need the "comodin characters" (ie: %. > _) to make "like" behave different from simple comparisons Not entirely true, if the database was initialized in a different locale than C, then the direct comparison will probably go for an index on username, while "like" will not. Which points to a possible index corruption... which might be interesting for the developers to investigate, but I would guess a reindex will solve the problem for the OP if he has it urgent... Cheers, Csaba.