I tested this and got the same results as the reporter. When the checkbox is clicked for "Officially supported (main)" the checkmark appears briefly then goes away. Below is the debug output. The lines after the gpg lines are repeated each time the checkbox is clicked.
$ software-properties-gtk -m -d (software-properties-gtk:28901): Gtk-WARNING **: Failed to set text from markup due to error parsing markup: Error on line 3 char 78: Element 'markup' was closed, but the currently open element is 'i' gpg: /tmp/tmpjsWZTq/trustdb.gpg: trustdb created gpg: can't open `/etc/apt/trusted.gpg' gpg: keydb_search_first failed: file open error ENABLED COMPS: set([]) INTERNET COMPS: set([]) MAIN SOURCES CHILD SOURCES CDROM SOURCES SOURCE CODE SOURCES DISABLED SOURCES ISV Regards, -- Jordan Metzmeier -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
