I believe that on M3.2 with messages the interface changed that when writing a message the 'enter' key is used to send the message. This is driving me nuts! It means that you can't easily write paragraphed messages. On similar systems (like Facebook) there is usually a tick box to disable it. This makes messaging horrible and in my opinion un-usable. I've searched for a Moodle Tracker (both MDL and MDLSITE) but cannot find one. Has this been raised before? If not then I'll raise an issue.