Firstly this is a new PC. I've not finished it and never announced it, so you @chparent yourselves to it at your own risk :P
you get space and comma problems if you have your own mcf_prefix_msg verb or property. the version of xm and xto on #1023 don't put a space or comma on your messages, so you'd normally get [Wizards] Paulmumbles "stuff" so in your messages you need a space and comma.
in xto, there is a verb which generates the " mumbles to Whoever, " string which does things with spaces and commas. the .pub thing won't work cause I never knew that existed (. is the pose verb :P) so I will have to add that in there someday.
if you don't like it, don't use it :P it's not really useful anyway yet.
-Paul.