Not sure about the nick in the channel being wrong when you typed "qwerty," but I have heard that the nicklist does not have UTF at this time. On most networks, this doesn't matter because you aren't allowed those characters for your nick. However, it seems that some do allow it, so this would be a good feature suggestion if it isn't already suggested.

Now, I notice that some nicks have those types of characters, but I'm wondering if those are UTF (like yours may be set to), or if they are entered with ASCII codes instead.