Not sure if this has been mentioned before, but I just accidentally clicked on a 'Rationalize static field access' inspection light-bulb, and when I tried to undo the change, it popped up an 'Undo?' yes/no dialog that did nothing when I hit 'Yes'.
I was only able to undo the change via the local history.
I've seen the 'Undo?' message box on other occasions, and I can't remember it ever undoing what it was supposed to...
If necessary, I'll put it into JIRA.