Norton File Incompatible

Hi, I just upgraded my OS from 10.5 to 10.6. After the upgrade a message popped up saying that some software was incompatible with 10.6, specifically the file "com.symantec.navapdaemon.plist" which was placed under the main directory in a folder called Incompatible Software.

I have not been able to download any fix for this using Live Update and was wondering whether this leaves my computer compromised. Does anyone know whether there is a patch or some way to update this file so that NIS works properly on 10.6? I'm using Norton v10.4.

Thanks