Special thanks to Georg who did pretty much all of this and I think may not have actually slept last night.
FireBreath 1.3.0 RC2 is released and available for download. See the changelog for information on how to update your plugin:
To update from RC1, basically remove FactoryMain.cpp, Win/FactoryMainWin.cpp, Mac/FactoryMainMac.cpp, and X11/FactoryMainX11.cpp. In their place, create a Factory.cpp patterned after this one: http://code.google.com/p/firebreath/source/browse/fbgen/src/Factory.cpp
Note that you can do this on a platform specific basis if for some reason you need to override the PluginWindow type or other. FactoryBase can be used to customize which classes are used for most critical FireBreath features.