Won't that mess up the dynamic data partition? i.e. I'll have to back that up first?

Downgrading to v2 wo n't really prove anything though will it? The database is created everytime from the fids(?). If the fids are corrupted assuming that's what you're saying, v2 won't fix them magically will it? I'd have to create the playlists again?

And if something really is corrupted, why does jemplode and empeg web lite show them properly? It's reading the same data.