Solve one thing and get another!
Since I adopted the dlls from MetaX to solve the movie durations problem another little glitch has appeared. This time it's on the video tab when TV shows are shown without the Show Episodes option clicked.
The '# of Episodes' now displays as blank, except immediately after an import when it will display the number of episodes imported. If you subsequently change the viewed status of an episode, the count decrements by one. If you compact the database the count disappears completely. If you close and subsequently re-open the database the count has disappeared completely.