FileSaver conflicts with new Mac OS 8 utilities?

Vince Loden writes that on both his Power Mac 7200/120 and his Power Mac 8500/180, "I've found that if the Prevention Preferences of Norton Utilities' FileSaver (in versions 3.5.0 and 3.5.1) are set for a QuickScan at startup, the machine hangs during the scan." According to a posting he spotted in Symantec's discussion groups, this appears to be caused by the CMM Plug-Ins 1.1 or CMTools 1.0 Contextual Menu utilities.