Game Mode

You can never run away from mobs

Joining player's inventory doesn't get saved

Furnace ignores item type (wood/coal)

Dirt can be turned into farmland under solid opaque blocks

Crash when paused or opened inventory

Digging straight down glitches out the breaking animation (Z-fighting)

[MSP/ASP only] Sounds not playing during Nether travel

Survival and Creative - Lag and Usage Differences from 1.2.5 or earlier...

Mobs lag and go through blocks.

Visual glitch with half slabs

I put fuel in the furnace and it uses it put after a few seconds it reappears and i am able to take it back without it disappearing

When in an already created world using 1.3.2, using the Anvil with any enchanted item crashes the game.

Zombie spawned with a skeleton's head

Sometimes when logging on to a server inventory and ender chests are cleared.

getting inside the wall and start losing health and that happen with all people not only with me

Pigs not responding to wheat or going into 'love mode' (Minecraft 1.4.2pre).

Skeleton and Spiders spawn everywhere.

Receive damage from travelling over lava in the Nether

Zombies unable to break doors

Arabic language

Block Cracking Animation

Axe Works Well On Pumpkins but not Melons

Disapearing Items

Snow Golem does not leave trail of snow in all biomes

Monsters and NPC's fall into the ground or through ceilings.

Two zombies pushing eachother away when attempting to break (villager) wooden doors.

Underwater creepers don't explode

Squids spawning everywhere.

Tamed wolf disappears

Zombie Pigmen in the real world.. it went throurgh the nether portal!