I get jerkiness myself (FF3, vista, 32). I don't know what the problem is or how to fix it, though I'd love to hear. Firefox has never been good with Flash for some reason. I'm using SWFObject, which I thought would have dealt with any problems.
The separate package doesn't matter me. In fact, I think I prefer it. The only complaint I have about your contributed code is that I have to patch the core Box2d classes all over the place. Upgrading when a new version comes out is going to be painful.
Hmm. This is really what source control etc is designed for. You don't need manually do all that patching, but instead make a patch from my contributed code, and apply it to the new version, or visa versa. I used to provide patches as well as .zip downloads, but it was apparent no one was using them. Also, the odds aren't too bad that the next version will come with some of this code.
The base controller classes are general enough that I think a lot of useful stuff could be built on them...
Exactly the point. Now hopefully we will be able to share snippets of code easier without having do adapt it to different frameworks every time.