When I trying to get to mineplex server with FEI my client crashes. It doesn't crash without FEI nor it crashes on other servers.
Crash Report: http://codepad.org/YXfrXZl7
Edit: it crashes when opening inventory.

Without any new reports, this will be considered as fixed.

And i does not crash with fei on any other server? Interesting...
Anyways, i'll look into it.

Can you try to reproduce this with 1.0.11, please?