Wow,
Now I wish I would have read the forum before upgrading.
I found another issue.
I've converted all my jpg's to NEF's using Nikon Capture. EM very happily displayed those NEF's. MO won't. Action log simply states "unable to scan media file".
Well as these files are roughly half my catalog, this is definitely a non-starter. Back to EM I go!
Yes, I logged a service request.
Chris