Since some hours, one of my minecraft world doesn't do anything anymore for some minutes, then it works properly for some seconds. These are the symptoms:
-animals/villager etc. dont move
-frame rate drops
-game doesn't save
-mined blocks dont drop entity-blocks and appear back after some seconds
-sometime you get teleportet to a location you were seconds ago (happens together with block re-placing)
It kinda feels like the game stops for some seconds (you can walk around and place blocks) and then renders everything in 1 second (like damage or mob spwaning/block placing)
I had this issue in the same world before in, i think 1.4 or so. I edited the level.dat and set time to 0, aswell as daytime, lastplayed etc. (everything with time). But this time this doesn't work.
It only affects one world.
EDIT1: I forgot; i also tried to get it running properly with a completly new level.dat. (is edited seed etc.). Before the bug appeared, i oppened the world in the snapshot 13w16a.
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Please start Minecraft by
minecraft.bat
java -Xmx1g -Xms512M -cp minecraft.exe net.minecraft.LauncherFrame 1> log.txt 2> error.txt
and attach log.txt
and error.txt
after the error occured.

i hope this time it will work. the error.txt is 31 mb big, so i couldnt upload it the normal way.

Sorry to say, but it looks like your world is corrupt:
2013-05-07 20:12:01 [SERVER] [SEVERE] Wrong location! qn['Schwein'/217, l='lalaalaaa', x=-553,55, y=65,00, z=144,45]
java.lang.Exception: Stack trace
at java.lang.Thread.dumpStack(Unknown Source)
at abw.a(SourceFile:504)
at acj.a(SourceFile:277)
at acj.a(SourceFile:72)
at acj.a(SourceFile:60)
at iy.f(SourceFile:125)
at iy.c(SourceFile:76)
at ix.<init>(SourceFile:26)
at iw.a(SourceFile:172)
at iw.a(SourceFile:203)
at gu.a(SourceFile:138)
at gu.c(SourceFile:185)
at gu.a(SourceFile:82)
at bjj.b(SourceFile:73)
at net.minecraft.server.MinecraftServer.r(SourceFile:480)
at net.minecraft.server.MinecraftServer.q(SourceFile:397)
at bjg.q(SourceFile:122)
at net.minecraft.server.MinecraftServer.run(SourceFile:331)
at gp.run(SourceFile:573)
Duplicate of MC-3766.

okay...is there any way to obtain the world from the save or repair it? I spent many hours in this world :/

You might take a look here http://www.minecraftforum.net/topic/137381-official-corrupted-save-recovery-thread/. In any case, you should always make backups of your world.

thank you very much! 🙂