CannotResolveSymbol wrote:

What bitrate and sample rate are your MP3's encoded at?  Maybe you've accidentally encoded them at some nonstandard bitrate or sample rate.

I tried a few, it seems that stereo has something to do w/ it:

256kbps, stereo, 44Khz -> BAD
128kbps, stereo, 44Khz -> BAD
128kbps, mono, 44Khz -> GOOD (except for the no stereo part).

Maybe Zune just can't do stereo.