Minecraft Version 1.7.10
JABBA 1.2.2
Carpenter's blocks 3.3.8
When I try to place a better barrel from jabba on a carpenter's block it bugs a lot. First time I tried placing the Carpenter then retexture it with cobble and place a barrel on. the block would get the lock icon from jabba and would look like cobble.

but then I placed another cobble in front of the block and when I break the cobble the carpenter block loses the lock icon.

Then I tried to place 2 barrels instead of one and it would have 2 lock icons.

The major problem is that when it lost the lock icon (as mentioned above) the barrel didn't drop after breaking the carpenter's block.

I also reported this bug to JABBA bitbucket
FML-client log
IMGUR Album with screenshots of the issue