Okay, so recently in my buddy's SMP server a few friends of mine and I build a huge pyramid, 12321 meters base surface area 55 meters tall. Now everything was fine and dandy until this most recent patch that added PVP and all that other crap. Now when I enter my pyramid I start losing health quite rapidly but as soon as I leave (assuming I make it out) it stops dropping. I googled around for like a half hour and came up empty handed.
^ This.