CH>RB3 Preview hangs and later sticks in loop

[FostUK]

When converting some files available on the big clone hero drive there is a hang when you get to the file.
After a ton of trial and error this seems to be fixed by setting preview_start_time to zero.

Songs will then stick in a 2 second loop 45 seconds in.
After more trial and error - deleting the drum oggs and rebuilding seems to allow the whole song to be played through.

A good example of this is all the songs from Band Hero, e.g:

[song]
name = Put Your Records On
artist = Corinne Bailey Rae
album = Corinne Bailey Rae
genre = R&B
year = 2006
...

set preview_start_time = 0 to prevent the hang in the music library, then delete drums_1.ogg drums_2.ogg drums_3.ogg drums_4.ogg

Leaving this info here incase it's of use in future debugging.
Happy to do some legwork if you have any other debugging suggestions.

Thanks for all the work on this amazing tool.