I just upgraded my Mk I to 2.00beta11. It took ages to do the first emptool sync;
I'm sure it went around `2104 Checking player media' several times before reporting
a few database errors. The next repair fixed the problems and sync went much faster,
but then I found that no tracks would play. They all said
Invalid file format
New files loaded on with the new emptool worked OK. Reloading the same files I
had before also cleared the problem, so I reasoned emptool was doing something extra.
`lookup' showed several extra fields, and `codec=mp3' looked like the best candidate.
I set that tag on some old tracks and those then played.

I bet it was all brought on by the addition of WMA support. I said no good would come of it!