I have had the new Paintshop photo Pro X3 installed on my PC for several days with no warnings from NAV 2010 that any of its files were infected. Then this evening it suddenly alerted to one of the files being an infostealer Gampass. The file was bwout.vfx in the folder C:\Program Files\Corel\MLE\Vfx_plug.
I restored the file and checked with Norton Insight, which simply reported it as unknown (which I changed to user trusted).
I checked the restored file against a copy I had in an image of my hard drive made immediately after installing PSPP X3, and it has the same MD5 hash, so I'm sure it has not been modified or infected since the install. I conclude that it is a false positive.
I have also submitted the file to Symantec.
Since NAV did not alert over several days, I must assume that the FP is the result of one or other recent update to virus definitions.