Hello! I have found a major problem that apears to only apply to me. But it's still a problem and I'd apreciate help. So here is the problem: Whenever someone tries to log into my server this error message appears http://pastie.org/4500469 Look at what happens when someone tries to log in. But before I go more in depth I'd like to give you all he information you might need. I have a windows 7 X64 bit windows home premium I have java 7 (or whatever the newest one is) I do not have any wrappers. It's a port forward The version of craftbukkit is the Recomended build (git-Bukkit-1.3.1-R1.0-b2320jnks) I'm not sure what "command" I'm using to run my craftbukkit server with. But I start it with a run.bat file, it's not a host it's a port forward if that's what is meant by "command" I am running: world guard, world edit, essentials spawn, essentials chat, essentials, magical spells, virtual chest, PermissionEx, and vault Here is the error: http://pastie.org/4500469 I have tried every logical conceivable thing that I have their of to fix this. Only one worked. And I'll explain that later here is the list: Restart server Restart computer Restart router Re-do my port forward Redo my port forward with a different port Re download craftbukkit Have like 15 people see if they could get on (all no) Consulting the all knowing google Restarting computer and router And all the small thing I'm forgetting. If I remember I'll update this Then I did 2 things that confirmed it is a craftbukkit issue. First I ran craftbukkit with fresh everything and no plugins. The error still occurred. So I did one last thing, I ran my old 1.2.5 craftbukkit server. And my friend and 2 others still in 1.2.5 were able to get on. Id like to add I had a server for a month or 2 and there were no problems. When I updated to 1.3.1 craftbukkit is when this problem began. This error is not on the forums and it is not online anywhere I googled 5 different parts of the error and nothing shows up. If any additional information is needed please ask.