I just scrolled the list of messages in evolution and got the same problem with the same code line there (however it only restarted mutter / gnome-shell once, I did not got the grey screen with "oh no..":
Jul 25 21:50:39 Henning-Thinkpad evolution.desktop[6258]: (evolution:6258): GLib-GObject-WARNING **: The property GtkSettings:gtk -button-images is deprecated and shouldn't be used anymore. It will be removed in a future version. Jul 25 21:50:39 Henning-Thinkpad evolution.desktop[6258]: (evolution:6258): GLib-GObject-WARNING **: The property GtkSettings:gtk -menu-images is deprecated and shouldn't be used anymore. It will be removed in a future version. Jul 25 21:50:39 Henning-Thinkpad evolution.desktop[6258]: (evolution:6258): GLib-GObject-WARNING **: The property GtkCellRendererPixbuf:stock-id is deprecated and shouldn't be used anymore. It will be removed in a future version. Jul 25 21:50:39 Henning-Thinkpad evolution.desktop[6258]: (evolution:6258): GLib-GObject-WARNING **: The property GtkSettings:gtk -toolbar-style is deprecated and shouldn't be used anymore. It will be removed in a future version. Jul 25 21:51:25 Henning-Thinkpad gnome-session[5453]: ** Jul 25 21:51:25 Henning-Thinkpad gnome-session[5453]: mutter:ERROR:ui/frames.c:1057:meta_frame_left_click_event: code should not be reached Jul 25 21:51:25 Henning-Thinkpad x-session-manager[5453]: WARNING: Application 'gnome-shell.desktop' killed by signal 6 Jul 25 21:51:25 Henning-Thinkpad gnome-session[5453]: x-session -manager[5453]: WARNING: Application 'gnome-shell.desktop' killed by signal 6 Best, Henning -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org