I tried to do another sync with a lot fewer songs to see if this would make a difference, but the synch kept giving me a "red X" error with a single garbage character where the explanation for the error should have been. I tried another initialize, and while it seemed to lock up, after a few minutes this initialize actually got all the way through (without another restore.)
A point of interest is that at this point, I was able to switch the highlighted selection between the iPod and other items without MC crashing -- i.e. with nothing on the iPod, the issue of MC crashing when changing the selection from the iPod to something else was gone. After my "small" sync, however, the problem came back -- i.e. once I selected the iPod, selecting another item crashed MC.
The small sync (222 songs) seems to have worked. No "error 80" code, ALL the songs for the albums in the list transferred, and Audible files play fine. This behavior is identical to the behavior I get with 9.1.316 -- i.e. when I do a small sync, the Audible files play. I think that this is somehow related to why some people report that this build works with the iPod, and why the JRiver testing indicates that it's working. When I do a small sync, it works fine -- but when I do a "full" sync of my entire library, all sorts of problems suddenely come up. I have no idea what the "limit" is, but it seems that larger syncs are causing problems with MC. Note once again, however, that even with the small sync, the "switching selections" bug is still occuring.
Larry