There is currently a bug in the megaglest-chat where you can repeat what you've typed multiple times. You can reproduce this bug by:
1. type a message in the megaglest irc chat, but DON'T press return
2. press alt+return, and your message will have been posted, everyone else will see the message, but you won't see it in your own chat. You need another irc-chat open in #megaglest-lobby to see the message
3. you can repeatedly press the key combination alt+return to send the message multiple times
I originally posted this bug here: https://forum.megaglest.org/index.php?topic=9147.0
. This is especially a problem in linux since the key-combination alt+return is very important when trying to escape from the game without closing it.