People everywhere don't understand a Dev build.. I see people posting on the Chrome dev releases that "it's buggy" and "fix it". Duh.
Perhaps there's something to be said about making only beta builds public, and dev builds an option for registered users only. And a board here at the forum for discussing dev builds only, open only to those people? Just a thought.
I beta test software for several developers, big and small, and understand the importance of test builds AND giving the kind of feedback devs need for those builds. There are obviously several people on this forum who get it, too.
If you download a dev build, it might not work -- only do it if you feel like testing, taking note, and giving detailed feedback on bugs. If you want to just do work with ST2, the latest beta is pretty solid, and I use it every day with no problems.