I have done some more investigation on this and found the following bug report: https://bugzilla.gnome.org/show_bug.cgi?id=650943
Clicking in the resize box triggers the mouse grab even when not running gnome-settings-daemon. I have also tested with non-GNOME gtk2 and gtk3 apps, and it happens only in the gtk3 ones, so I'm reassigning this to libgtk-3-0.
I have done some more investigation on this and found the following bug report: https:/ /bugzilla. gnome.org/ show_bug. cgi?id= 650943
Clicking in the resize box triggers the mouse grab even when not running gnome-settings- daemon. I have also tested with non-GNOME gtk2 and gtk3 apps, and it happens only in the gtk3 ones, so I'm reassigning this to libgtk-3-0.