This patch fixes a memory creep issue/leak, makes some blocks softer for landing, and fixes several other minor issues.
0.851 change list:
now reuse opengl buffers (cuts down a lot on creeping up memory usage)
now only take half damage when landing hard on soft surfaces (mud, snow, sand, slush, & tar)
fixed cloth hats, staves, and wands not giving their mana boost to player (Impus)
fixed potted plants and trophies not transitioning to new world correctly visually
made item on ground effects match item rarity more and be bit larger
evil god power bar will now glow when close to full
good god power bar will now glow when close to full
quest threat bar will now glow when close to full
dead bodies now have more flies
can no longer use higher end vials if don't meet the min requirements
changed north/south signs to up/down
added a shadow behind markers on maps to make them stand out a bit more (ScrObot)