Mod version: buildcraft-6.3.3.jar
Forge version: 1.7.10-10.13.2.1277
Other mods: https://docs.google.com/a/graythought.com/spreadsheet/ccc?key=0AndvSyXha_pPdHRYTXVtNVpHSzhrNjZxTDAzS2V3UEE&usp=sharing#gid=0

The Refinery seems to accept Fuel when it can do absolutely nothing with it. You then cannot pull the Fuel out regardless of what side you pull from. It seems like it should only accept Oil if possible.