I posted this under one of the last few builds but here is some more info.
I tested this on ifo's that i want to set media sub type to TV Show.
Tag on import only works for Media Sub Type on the initial import.
If the ifo's are removed and re-imported the media sub type is movie.
Tested on 3 pcs with 100 ifo's all come up 'movie' after RE-imported.
The only thing in the import options is Media sub type=TV Show
All avi's, mpg, mkv, etc, import fine with TV Show as media subtype.
Just did a re-import on an ifo that i wanted to be 'Music Video' and it came up 'Movie' as well.
Again, the initial import was 'Music Video' and the re-import was Movie.