Last modified: 2014-02-12 23:48:07 UTC
In MF beta (logged in), I tried editing http://en.m.wikipedia.org/wiki/User:Awjrichards?action=edit and http://en.m.wikipedia.org/wiki/Foobar and both times on save I was sent to the desktop site (en.wikipedia.org), and my edits were submitted.
https://gerrit.wikimedia.org/r/#/c/37600/
Max's fix seems to have done the trick. Marking fixed.