Hi all, I have just made a new install of minecraft 1.5.2 and I have come across a block I have never seen before. It appears to have two states, the state I found it in (see below) and another state when right-clicked on, the block appear not to be harvest-able. Is this an error, or is it a placeholder block for a future update to a mod. btw, I have over 150 mods installed, so I am unaware to which mod this block belongs to.