Thanks for the reply. Let me comment on each.
-Can you explain further what you mean by "broken storage"? Data corruption? How do i test/fix this?
-I assume I have permissions since I can open the app and move through the various options. The only thing I can't do is play tracks. And if there was a permission problem, why wouldn't the message be some sort of security or access message instead of "Storage Unmounted"?
-Already did a Full Rescan (please see my email)
-Not sure what you mean by "non stock" roms or system level mods unless you are referring to some custom coding/changes that I or others have done which is not the case.
-I have not hacked/modified app in any way (see above).
Look forward to your comments.
Marc