Put your operating system (Windows 7, Windows XP, OSX) and Java version if you know it here
Put the summary of the bug you're having here
What I expected to happen was...:
to possibly place an Ender crystal on the bottom of an obsidian block
What actually happened was...:
I placed a block on top of the obsidian block, and was able to constantly place Ender Crystals on the same block
Steps to Reproduce:
1. right click an obsidian/bedrock block from the bottom (or sides) with an Ender Crystal.