After I've been on the irc for a while, about 20 minutes or so, it says "Nickname is already in use" and adds a 1 onto my nickname. If I then try to post it says it can't send the message cause it doesn't allow external messages.
Here's a screenshot, in this particular case it happened a bunch of times immediately after each other and kept incrementing the number after my name.
![](http://giantjelly.net/Image%20064.png)
This one shows the "can't send message" error.
![](http://giantjelly.net/Image%20065.png)