[MC-31599] Game Crashes when entering worlds before 1.6.4

When opening up an old world made before 1.6.4, the game instantly crashes. It use to run fine before the update, but the game has now suddenly stopped working. Creating new worlds seems to be fine, but joining already existing worlds causes the game to crash. Bug report;

http://pastebin.com/nBFMnbSQ

Comments 3

Tails 2013-09-19T16:17:14Z

-- Corrupt NBT tag --
Details:
        Tag type found: INT
        Tag type expected: BYTE
        Tag name: Time

You've configured a falling sand spawner incorrectly. Time tag is a BYTE, not INT. http://www.minecraftwiki.net/wiki/Chunk_format#Dynamic_Tiles

Momo Peres 2013-09-19T16:20:54Z

Wait a sec.... what is 1.6.4? It's not written on the wiki, forums, mojang's website...

Ollie Fatheiz 2013-09-19T16:21:15Z

This world has worked in the past though, I cannot access the world at all as it crashed on entering it with the new update