I know some of you have been having difficulties editing your posts recently, particularly in the RoG.
Systematically, everything is fine. At first I thought it had something to do with the anti SPAM software we use, but now I think it has to do with fonts. Try posting with default font first, then edit to a different font if you want to change it.
Sorry for the trouble, I'll get to the bottom of this with you guys' help.