My computer turned itself off earlier today (I think it was too hot or something) while I was playing Feed The beast (ultimate pack) and just now I hopped onto my world only to find every chunk in my base containing an ender chest of tank (most of them) deleted and reset. This however was not the first time this has happened, I lost my base on my first world (Mindcrack pack) to this same glitch.
So if you do not want your base deleted do not use ender tanks or chests.
So if you do not want your base deleted do not use ender tanks or chests.