Arghhh I hate this so much. The problem with the non-native facebook exporter is that it doesnt export the photos as well as the iphoto facebook exporter. A lot of quality is lost.
The only thing I can think of doing is going to the following menus in iphoto:
iPhoto -> Provide iPhoto feedback
If enough people complain, theyll sort it out by the next release. It's irritating me so much..