[Mikuro]

Hmm. I thought it was all about the length, so I'm not sure. Are there by any chance brackets — [] — in the names of the files that don't work? I remember that there were the last time I had the problem, and after I cut out the bracketed part, it worked.

Have you tried using Joliet naming? It should support long file names, too. I don't remember if there are any gotchas with it, though. It's been a while since I've tried it.