Minecraft wiki entry for Development_versions, associated text: MC-737 – Map scaling breaks the map sometimes.
MC-1086 – [FIXED] Command block/Repeater acting weirdly.
MC-1642 – Minecart noise gets stuck on long cart rides. Bumping, choppy sound.
MC-1972 – Redstone torch sometimes update instantly (not the North/South quirk).
MC-2257 – Minecraft VERY slow to join/update a server, takes LONG time to login (30 seconds/ 1 min).
MC-2526 – Rain animation glitches through the ceiling.
MC-2806 – Anvils will sometimes hit the edge of a block and break instead of being placed.
MC-3597 – Floating minecart tracls when pushed by one-pulse piston.
MC-3662 – Pistons and other Non-Solid blocks.
MC-4752 – Failed to save player profile.
MC-5691 – 1.4.6 - Windows 8 64x - Mouse: View issues/Accuracy error?
MC-6131 – Crash upon reloading texture pack.
MC-6699 – Reading Bytes in Minecraft code has a possible flaw.