I hit 'I' to get the Inspector just now and got this instead:

 
I had it once yesterday also but didn't get a chance to screen capture it.  The only commonality with yesterday and today is that I'm using Melodyne Editor as a plugin on a vocal track.
Will the recent Quick Fix eliminate this?  I haven't applied it yet because it carried a caveat saying kind of "don't apply it unless you have to" from which I infer that other unpredicatable problems might occur.
I didn't did get the automatic bug report popup, just a problem Sonarpdr popup and total exit.

Reproducible - can someone with Melodyne 2.0 check for me please?

- Insert Melodyne Editor 2.1 as a plugin on a track.
- Make that track the focus
- Hit 'I'.

The normal Inspector picture can be resumed by leaving the Inspector open, making another track the focus and then putting focus back on the original track.

You should definitely install the quick fix. That addresses issues like this.

Thanks Noel, I'll give it a go.

Nope, same behaviour:
I'll file a bug report.

Can you try and repro it on a new project from scratch?

Yes, Noel.  I just tried that.  Bad news: this time I opened a one track one loop project, WITHOUT Melodyne!  This is really worrying now.