What is Bloodhound.Packed.EPW?

My Norton AV2008 indicated that "Statistical Submission" was made on a "Bloodhound.Packed.EPW". It was found in several files. It indicated the risk as low and actually on my subsequent scans it did not show anything. I have my NAV2008 to be part of the Norton Community watch. While it submitted this to Norton, it did not indicate that there was any action to take. Anyone know anything about this? Also not interested in hearing how bad Norton is.