MDL-8807 and MDL-8564: Jamie had replaced the three group modes with Yes and No, for some undocumented reason (See http://moodle.cvs.sourceforge.net/moodle/moodle/lib/form/modgroupmode.php?diff_format=h&view=log&pathrev=MOODLE_18_STABLE#revtext). I reverted his changes, and this seems to work normally now.
MDL-8807 and MDL-8564: Jamie had replaced the three group modes with Yes and No, for some
undocumented reason (See http://moodle.cvs.sourceforge.net/moodle/moodle/lib/form/modgroupmode.php?diff_format=h&view=log&pathrev=MOODLE_18_STABLE#revtext).
I reverted his changes, and this seems to work normally now.

dilawar/moodle