Bukkit

What steps will reproduce the problem?
1. start up game
2. game runs fine
3. when someone join the server the game crashes

What is the expected output? What do you see instead?
it to keep playing , It just makes it so you cant shoot , everything is the same but you cant shoot aka you cant play the game ,

What version of the product are you using?
latest

Do you have an error log of what happened?
no , no errors

Please provide any additional information below.
"Update:
We reboot the server, everyone joins and it works fine.
As soon as a new player logs into the server, we can no longer shoot.
Our chat text turns back to normal as if the arena is over, but we are still running around inside.
as long as nobody joins the server while we are in Quake, it seems to be ok.
hope that helps" That was in the comments