When a player (InGame) speaks from a channel which is not registered in the channels folders, its messages can still be read from the IRC.
Let's get an image : https://picasaweb.google.com/lh/photo/WzwlNKq8gBi2FyRNt8clK5-vAoJvZ1eDAq_HffS-R-I?feat=directlink

Here, [G] correspond to the Global channel, for which I've made a Global.channel and [MED] does not have any file in the MonsterIRC folders.

Same thing for the /tell messages from Herochat.

[edit] You can see the strange message on joining the channel too.

This should be fixed in the next version, it's waiting approval (v:1.21)