I've noticed that $cnick will no longer work unless you are on a channel. It used to work correctly in previous versions, there's no need to be on a channel if you're only listing information stored in the nick coloring section of the address book (mirc.ini,cnicks).

Also $window(whatever).fontsize does not return the correct fontsize...

Not sure if these have been brought up already, but I didn't see them on the 3 pages that are currently available...