I've got some tracks that play fine in iTunes (and with QuickTime & in Finder), but either 'hang' when transcoding in SqueezeCenter (the Apple Lossless) or just skip rapidly when in the playlist (the AAC/normal files).

I tried taking the lossless and running it through alac manually, outputting to a .wav file, and it seemed to work just fine. I assume the AAC would work as well with mov123 or whatever is used for aac.

Note that these tracks recently had album art added to them... I don't know whether that's relevant. Note, too - while they play back as 'local files', they do not play back on an Apple TV or using iTunes 'library sharing' - with no specific error listed.

Two example tracks available on request, but not attached to the bug because they're large and copyrighted.