Thanks for the comments. Oddly enough, it seems like the only thing that is broken for me is the user roles. The capabilities seem to work just fine. Hopefully someone will come up with a solution soon.
Well, it’s good to know that I’m not the only one with something funky going on. I have hundreds of members, and the one Key Master I setup during the install. Nobody else has a different role set, even though the User Role Mapping is filled out. Very bizarre. Unfortunately, I’m not sure how to change that manually, either.
Edit: Just checked – Users created in BBpress get assigned no role in WordPress as well. It seems that everything works in the Sync except Role mapping.