Null Pointer: PipeItemsTeleport

Crash Report:
http://pastebin.com/ZtQFqVp1

I first caused it to happen when breaking a pipe connected to the receiving end of a teleport pipe. It seems to happen randomly and I am unable to reliably repeat it.

Installed mods:
Forge: 7.8.0.710
FML: 5.2.12.710
Buildcraft: 3.5.3
Additional-Buildcraft-Objects: 1.0.4.150
APUnofficial: 2.3.0