Comment 2 for bug 569361

I'm curious what the valid use cases are for this behavior; the one I've heard seems misguided:

 "lp:mysql was once the stable branch for the latest released version. If I pulled and got a version change from 5.0 to 5.1, I wouldn't like that semantic change."

My reaction seems to be a little distasteful. I wouldn't expect "lp:mysql" to be a specific stable version, I'd expect it to be a development branch. If it was "lp:mysql-stable" I would always expect to get the latest stable version. If I wanted 5.0 to be 5.0 and stay 5.0 I'd branch "lp:mysql/5.0"