a bigger problem is that a channel in upper and lower cases are treated as two different channels. the channel #åäö, #åäÖ, #åÄÖ, #ÅÄÖ etc are all different channels.

This maybe doesn't mean much to a big part of the mIRC users, but imagen if #mIRC and #mirc and #MIRC was three different channels, it would be rather anoyong.