MUC input entry does not become active when joining with a nickname containing "special" (unicode) characters.
MUC input entry does not become active when joining with a nickname containing "special" (unicode) characters, so you can't type text even though you're joined to the channel and receiving events. Nickname changes are okay, you must join the room with a special nickname to trigger this bug.
Not sure why this happens; I compared the XML between joining with a "plain" nickname and a "special" one, but don't see significant differences. (Diff attached).