I found a similar bug. You can set emote.s to things like "/sevil" and put it at the start of a message. It will show up as the emote, but if you send it you still get the imperial march music and the bats flying. E.g.
I put "/sevil" as my
emote. I type "/sevil" and
shows up, but I hit send and the imperial march and
appears.
Edit: Same behavior with ones like (!WAT).