I had been running the program for some time (intermittent activity). Last thing I remember was checking out some things in Library.
Then I went up to Menubar to close app as usual.
Result: spinning pizza.
After a short wait I decided that it wasn't going to close.
Went to dock. Right clicked.
Noticed "Application not responding".
Force Quit.
Logs attached.43325.Archive.zip
I'm astounded. This app is generally rock-solid for me, unless I go spelunking, as Cameron would say, when the "usual suspects" in Tools can play up.