What is that for a Error ?

Hello There

When i start my server than i read this on my console , but what is it ?

2011-11-01 10:33:42 [INFO] Preparing start region for level 3 (Seed: 1772835215)
2011-11-01 10:33:43 [WARNING] Wrong location for net.minecraft.server.EntityCreeper@118 in world 'res'!
2011-11-01 10:33:43 [WARNING] Entity is at -12.5,257.5 (chunk -1,16) but was stored in chunk 13,9
2011-11-01 10:33:43 [WARNING] Wrong location for net.minecraft.server.EntitySkeleton@119 in world 'res'!
2011-11-01 10:33:43 [WARNING] Entity is at -12.5,257.5 (chunk -1,16) but was stored in chunk 13,9
2011-11-01 10:33:43 [WARNING] Wrong location for net.minecraft.server.EntityZombie@11a in world 'res'!
2011-11-01 10:33:43 [WARNING] Entity is at -12.5,257.5 (chunk -1,16) but was stored in chunk 13,9
2011-11-01 10:33:43 [WARNING] Wrong location for net.minecraft.server.EntityCreeper@11b in world 'res'!
2011-11-01 10:33:43 [WARNING] Entity is at -12.5,257.5 (chunk -1,16) but was stored in chunk 13,9
2011-11-01 10:33:43 [WARNING] Wrong location for net.minecraft.server.EntitySkeleton@11c in world 'res'!
2011-11-01 10:33:43 [WARNING] Entity is at -12.5,257.5 (chunk -1,16) but was stored in chunk 13,9

Thanks for your help.

 

Use Chunkster on your world, this will probably fix it.

 

Thank you <3

EDIT: hmpf doesnt help , i have run chunkster but i get the error again

 

Try it on all your worlds, might work