One player on my server gets this crash ocassionally: http://pastebin.com/snFEiAFd

Your player neeeds to increase permgen size and/or the amount of memory available to Java.

Funny is, he had problems with his internet, his permgen space was 256/512 MB, so plenty. And we were both in the same dimension, just he crashed over and over again. Maybe wobbly internet makes your reactor produce a clientside memory leak?

As you can see: Caused by: java.lang.OutOfMemoryError: PermGen space And I doubt that @erogenousbeef uses ASM and/or class generation anywhere, so it is not BigReactors issue.