Bukkit

What steps will reproduce the problem?
1. Go stand at last tile before exit from fightFreeRegions
2. wait for attack by other person
3. try immediately to enter to the fightFreeRegions

This probably cause this error ;d

What is the expected output? What do you see instead?
After above steps plugin send me alot of messages;
You're fighting, can't let you in fight-free region!

and after this server stopped responding ;p

What version of the product are you using?
0.1.1.1

Do you have an error log of what happened?
http://pastebin.com/Wnbkfett

Please provide any additional information below.
Spigot version: git-Spigot-1299 (MC: 1.7.2)

One of my users reported same issue, it's hard to come by but if aware of it one can crash server at will, which was adressed in 0.1.1.0, yet not completly as I see.

I am aware of that issue and it's importance.