The confusion is understandable. Most of the Mods here
do work for JRiver, except me and jmone. I've done a
little side-consulting work for them, more recently, but mostly I just help out on the forum with spam and keeping the natives in line.
The boards
are followed by JRiver staff. In that last thread I found, Adam wanted a log file from the user, so perhaps recreating the issue and capturing a Log package might help:
http://wiki.jriver.com/index.php/LoggingIt's possible there was a regression from their fix he referenced, but my guess would be that you found a more unlikely edge case that causes it. You mentioned that it happened when you ripped a second disc by the same artist. Can you reproduce it with other, unrelated discs?