Why does safari try to open my Norton File Guard protected file?

Question

When I start up my Mac Powerbook (OSX 10.5.8), Norton File Guard reports that Safari (version 5.0.6) is trying to open one of my Norton-guarded files, which happens to be an InTouchWith data file with the extension .itw. (InTouchWith is an older Contact Management application from Prairie Group Software). Why would Safari try to open this file, and how do I find out what other un-guarded files Safari is 'secretly' trying to open every time i launch Safari?  This is very disconcerting, to say the least, from a security standpoint.  This Powerbook can't run any Mac system higher than 10.5.8, and can't run any newer Safari version, so upgrading to gain newer security features of Safari, is out of the question.  When I launch Firefox ver. 3.6.28, (the newest version that is compatible with my Mac), Firefox doesn't trigger these Norton FileGuard error messages.

Answer 1

Get rid of Norton.
Norton Antivirus (made by Symantec) has a very long and illustrious reputation for mangling Mac OS X systems, sometimes to the point where a complete reinstall is necessary. Among other things, it installs kernel extensions which are known to cause kernel panics and system freezes; it contains known and documented bugs which can silently corrupt Adobe Photoshop and Adobe InDesign files, destroy a user's ability to authenticate as an administrator, and (on PPC systems) can cause Classic to stop functioning; and Symantec has on at least two occasions now released flawed .dat file updates which erroneously report certain critical Mac OS X files as "viruses." (Deleting these "viruses" causes damage to the system that in some cases renders it unbootable.)
Norton Removal Tool (Symantec Uninstaller):
http://www.symantec.com/business/support/index?page=content&id=TECH103489&locale =en_US