Comment 2 for bug 1640250

OK, update: this can happen when Inkscape is unattended for a minute or so, with a file open that has been saved and then not worked on.

The dialogs this time were basically making it impossible to quit, because of what might be considered another Inkscape bug which is that I had done something which did not alter the file I had open but nonetheless made Inkscape ask me if I wanted to save the changes before quitting. In turn that meant I had another dialog to focus on and there was not time to click 'close without saving' before yet another 'rogue' dialog popped up in front.

So the effects of the bug are to:
* raise multiple dialogs unrelated to the user task
* prevent the user from clearing these dialogs
* prevent the user quitting Inkscape cleanly (I used kill)
* probably lose any unsaved work as a consequence of being unable to save before killing the process.