As the title states, there is a bug with the 1.6 version of BM which allows infinite LP in the altar. Not quite sure what causes this but here are the steps to recreate it.

1. Place Blood Altar
2. Connect Fluiduct to Blood Altar
3. Place Extra Utilities Drum with a buckets worth of Life Essence in it, below the Fluiduct
4. Set Fluiduct to extract from the Drum
5. After the Life Essence from the Drum gets transferred into the Altar the LP in the altar still goes up by 20 LP per tick

Is it still going up after a long period of waiting? I think you are looking at the input/output buffer mechanic.

Oops your right. Sorry I was asked to report this by someone else so I didn't really test it much.