It may help to remove, then re-install the font set in Suitcase. The program FontNuke has an option for resetting Suitcase; this is also worth a try, but BE CAREFUL: If you let Suitcase copy fonts to the vault, these will be deleted (I think). If they are your only copies, they may well be gone gone gone. If you try the FontNuke option, I think it removes all sets from Suitcase, and they'll have to be reinstalled. There is also a suitcace plist, called com.extensis.SuitcaseFusion.plist; you could try moving this to the desktop (with Suitcase turned off); start Suitcase, and it will make a new plist, and if this helps, fine. If not, you'll have your old plist to put back in its place, if you wish.