Upon issues a //move command we got a complete server crash:

NPE: http://pastie.org/private/fhufhov2vdlpmnzbfbeyg
Crash log: https://gist.github.com/anonymous/1740b5a792f7472744a2

Was able to recreate on test server, reproduced by having a pet inside the selected region and trying to move it. Seemed to create a duplicate of the pet before crashing.

Looks like it's the same as the crash fixed in this commit: 8948899 (reported at #410).

Hopefully that fixes it for you :)

Closing - duplicate of #410.