So far...
I had some issues with Pro-Channel. Seems I had
two Pro-Channels working on several midi-audio tracks. I could display one in the console view, and another in the Inspector. The Inspector one did not manipulate the light/buttons in the console view, but both were active as I hear changes when modifying either EQ. In addition, there were other midi-audio tracks that would not display a Pro-Channel in the Inspector at all, although they would in the console view.
Thinking back - I believe I originally started the project in X2 Essential. I decided to delete these tracks, since they were only VST synth audio outs, and quickly recreate them. (Colored tracks and busses made this really easy...). Problem solved - it's likely there's a corner-case type of problem when opening a file from a non-ProChannel version of Sonar - but it's unlikely that most folks will run into it.
One bad 32 bit plug-in made the teleport bridge blow - not much to report there....