You're right. I have no explanation for this behaviour.
I tried a User Agent switcher to see if the Chromium useragent triggers it, but there's no difference.
What does work is copying the editing URL into the browser's URL entry field... this edit is the proof.
Also, double-clicking the Edit button also seems to work.
Last edited by Alien Bob; 11-26-2013 at 02:47 PM.
Reason: Trying the 'edit' function without using the 'Edit' button.