Here is one problem I've seen repeat since going to SWx2011. In Config-1 I have this derivedholepattern looks great. Go to Config-2 or any other for that matter and the derivedholepattern is there but it has nothing in the pattern. You go to edit the pattern the phantom parts show up and on the list too, but close it and it's empty. Come on SP3.
SolidworksConfigurations design Tables