Information from Symantec John Harrison (of Symantec) replies:"We have currently become aware of an issue regarding Mac OS 8.1 and Norton AntiVirus. The problem appears to be connected with Norton AntiVirus Auto-Protect and SafeZone scanning on Mac OS 8.1 systems only. We have not seen this issue on any earlier version of the Mac OS. The problem also appears to be intermittent in nature.
We are currently investigating the situation to determine where the problem resides. … Read more