20246 ----- Issue 6518: SystemChangeNotifier - cleanup step 4 http://code.google.com/p/pharo/issues/detail?id=6518 Issue 6524: StartupPreferences loads non-Smalltalk files http://code.google.com/p/pharo/issues/detail?id=6524 Issue 6528: GroupAnnouncer announcer DNU http://code.google.com/p/pharo/issues/detail?id=6528 Issue 6529: Method changes not picked up by MC Browser http://code.google.com/p/pharo/issues/detail?id=6529