This just happened to me in the system's modal dialog asking my password to unlock my keyring. Because of that I don't think that it's related to gdm3 only, but I have no idea what project I should actually report this.
-- Thiago Bellini Ribeiro http://hackedbellini.org PGP: D70FD60E “Real knowledge is to know the extent of one's ignorance.” - Confucius
