Minecraft Beta 1.9 Prerelease-5

ChangeLog

Block of iron texture is changed. Pic

You now have mushroom biome grass in your creative inventory.

Fence Posts no longer connect to leaves.

More achievements.

Annoying Stair glitch fixed. Confirmed by redditor meesebyte.

Option to disable clouds in menu.

F6 = smooth walking It seems to allow you to fly strait but not up or down (works on survival). It acts as a noclip, lets you go through blocks... Your Y co-ordinate doesn't change.

F9 Adds a fixed camera angle.

Passive squid animation is now vertical. (Credit to B1ueStarfish for finding this)

Lily pads are no longer gray in inventory, have a tool tip.

In creative mode hostile mobs no longer attack you unless provoked, except for ghasts and spiders. Note Enemies from spawners are still hostile. (Thanks theriverotter)

Melon slice drops are back to normal! (Thanks dg200)

Pressing "N" "M" "Y" "U" "O" and "H" changes depth of field and angles of camera. (Thanks Pupetteer)

You receive a warning when changing render distance to far.

Items retain their enchantments if chest is destroyed.

You can now look around without a mouse using: I, J, K, and L.

Slimes not restricted to y0-16 anymore.

Game Crashing piston glitch fixed. Video demonstrating bug

Player bow drawback animation improved.