In addition to comments prior. Also, look for repetitive patterns within a specified time gap. That would trigger the pass/fail measure. What was tested? Your DV tape, the Dbeta transfer or a file created from the Dbeta txfr?
If it was the Dbeta is the method of transfer to Dbeta from your DV tape a good transfer. Is that process introducing the image anomalies? i.e. From deck to deck how is the visual image being converted. That is Video out of the DV deck to video in on the DBeta deck. SDI, Firewire converter, analogue? An incorrect signal setup can introduce video levels that cause issues as well.
In any case you should be able to request the data from the harding software app log. It is time stamped and should tell you if it is Luminance based (like you stated) or spatial.