Is there still the requirement that jQuery be loaded /after/ the other lib(s)? The wiki page on this[1] doesn't explicitly say so, but I do (now) remember it being an important point in an earlier version of those docs when it was on the main site. I just spent a good bit of Angry Time with some scripting because I'd forgotten this, and pushing the library (moo.ajaxin this case) above jQuery suddenly fixed my problem.
[1] http://docs.jquery.com/Using_jQuery_with_Other_Libraries