Comment 22 for bug 1824874

Last night I encountered similar bug behavior with a different message. Several hours after a printing related crash, another orphaned authentication dialog was painted on top of the gnome shell with the message:

Please enter your password to access problem reports of system programs

In light of this related problem and Sergey's suggestion of PAM involvement, I now believe the original bug in this thread is caused by incorrect handling of PAM by gnome shell. There could also be threading problems, insofar as the incorrect painting of an orphaned dialog window seems to occur long after the action that is referenced in the dialog window.