When MySQL 5.1 first went GA I had the same knee jerk reaction as most of the community, “It’s not ready! There are still bugs!”. After thinking about it for a week or so I don’t think this matters. It’s true that MySQL isn’t really ready for GA but it doesn’t matter since most MySQL users I know wait several releases before even trying out a new GA release anyway. This varies wildly of course. Some users love the bleeding edge while others are still back on 4.1. This isn’t MySQL specific either. We do the same thing with most software. I don’t like that MySQL changed their requirements for a RC candidate to move 5.1 along but for most users it doesn’t matter. We will sit quietly and wait for 5.1 to stabilize before even thinking about deploying it. I’ll give it another six months.