Minecraft 1.5.2
MCP v7.51
FML v5.2.23.737
Minecraft Forge 7.8.1.737
FTB Unleashed 1.1.3
TConstruct_1.5.2_1.4.2.1.jar
CraftBukkit git-MCPC-Plus-jenkins-MCPC-Plus-Legacy-623 (MC: 1.5.2) (Implementing API version 1.5.2-R1.1-SNAPSHOT)
MultiInv 3.2.5

On our FTB server, we have several survival worlds and one creative world.
We use the Bukkit plugin MultiInv to group survival world player inventories, health, gamemode, XP, etc. seperate from the creative world.
However, MultiInv does not recognize the armor GUI from Tinker's Construct as an inventory it needs to seperate.
Is there a way to fix this? I am also submitting this issue to the Tinker's Construct github.

I am aware that you are no longer supporting minecraft 1.5, but I'm posting this here incase a fix for minecraft 1.6 needs to be done on MultiInvs end.

FTB is unsupported by craftbukkit, and we have no plans of supporting custom inventories by mods as we would have to hook the mods themselves, which is time consuming and defeats the purpose of an API.