Ubuntu 13.10 64bit
Java(TM) SE Runtime Environment (build 1.7.0_17-b02)
The newly added support for partial matches of NBT data breaks commands that check for empty containers.
Steps to reproduce:
1. Place a container with any item in it, .e.g. with
2. Check whether the container is empty, e.g. with
3. The second command returns "Successfully found the block..." despite the container being empty due to the partial matching.