we encoutered the following bug:
When we drag NV from a clip to favorites in the plugin list in the left window, then we drag NV from favorites to a new clip then we do a resize of this new clip with the NV plug and try to erase it or turn it off, FCP quits.
then it seems it corrupts all favorites as it start to do it wth other plugin from favorites.
This seems to only happen on the PPC version but not on the intel.