Short list of changes:
- added basic backtrace rendering to Facebook Debug Panel
- added “raw_xml” method to the Facepricot responses
- parsing of facebook.yml is more helpful when you specify absolute URLs instead of relative paths
- improved usage of fb_sig_session_key to create Rails sessions
- miscellaneous corner case fixes to url_for and redirect_to
Hope this helps people out. Initial feedback sounds like it is a pretty solid release.