The Quicktime message is because it's 32 bit only but it isn't used anyway, it's just linked in by wxWidgets.  I believe if you disable the 'media control' features with configure it won't link them in, but I don't know off the top of my head what the right options for that are.  I noticed that even disabling the 'debug_flag' with configure, the latest svn of wxWidgets still pops up the assertions.  I'm not sure how to disable it completely, maybe I'll dig around in the wxWidgets code.  The 2.9 release of wxWidgets doesn't look very good on mac for me, so I used the latest from their svn.  They are doing a ton of work rewriting it with Cocoa.