Steve,
Still not working. I just did a full restore, followed by an MC initialize and a new full sync. I then disconnected the iPod, closed MC, and checked the Audible songs on the iPod, which all played fine. I reconnected the iPod, started MC, and did a new sync of the exact same playlist without changing anything (i.e. this sync would not add or delete any files from the iPod.) After this sync, none of the Audible files would play on the iPod.
Did you disconnect the iPod, close MC, reconnect the iPod, and restart MC when you tested this? When I simply ran two syncs in a row without disconnecting or closing MC, the files still played. When I disconnected and restarted MC in between the two syncs, however, the new sync broke Audible file playback. I bet that if you try this procedure exactly as I described, it will fail for you as well.
Also, a while back there were some Audible/iPod/MC issues that ONLY came up if a lot of files were on the iPod -- i.e. tests with only a few Audible files on a fairly empty iPod did not show the problem. Was your iPod fairly full?
Given that this problem does NOT happen with 147 or earlier on this system, and given that it happens with BOTH my iPods, it seems to indicate that this is still an issue with MC.
There was no mention of a fix for this in the release notes for the last build -- are you sure they addressed this issue with 150?
Thanks again for looking into this,
Larry