What I was doing:
exploring an ender dungeon
What I found:
1) doors consisting of two top halves
2) wooden doors not opening and sometimes causing a crash at right click
3) all doors disappear when activated with redstone
Environment
64-bit
ubuntu 14.04 LTS
RAM 8G
CPU: Intel® Core tm i7-4700MQ CPU @ 2.40 GHz x 8
GPU: Intel® Haswell Mobile
100 GB SSD
laptop
$java -version --> outputs:
java version "1.7.0_51"
Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.51-b03, mixed mode)
Dupe of MC-60193