Null Pointer Exception

I am pretty sure this is not a Bukkit bug but I can not figure out what the problem is.
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2011-05-29 13:49:59 [INFO] Starting minecraft server version Beta 1.6.5
2011-05-29 13:49:59 [INFO] Loading properties
2011-05-29 13:49:59 [WARNING] server.properties does not exist
2011-05-29 13:49:59 [INFO] Generating new properties file
2011-05-29 13:49:59 [INFO] Starting Minecraft server on *:25565
2011-05-29 13:49:59 [WARNING] Failed to load ban list: java.io.FileNotFoundException: banned-players.txt (The system cannot find the file specified)
2011-05-29 13:49:59 [WARNING] Failed to load ip ban list: java.io.FileNotFoundException: banned-ips.txt (The system cannot find the file specified)
2011-05-29 13:49:59 [WARNING] Failed to load ip ban list: java.io.FileNotFoundException: ops.txt (The system cannot find the file specified)
2011-05-29 13:49:59 [WARNING] Failed to load white-list: java.io.FileNotFoundException: white-list.txt (The system cannot find the file specified)
2011-05-29 13:49:59 [INFO] Preparing level "world"
2011-05-29 13:50:00 [INFO] Preparing start region for level 0
2011-05-29 13:50:01 [INFO] Preparing spawn area: 4%
2011-05-29 13:50:02 [INFO] Preparing spawn area: 4%
2011-05-29 13:50:03 [INFO] Preparing spawn area: 8%
2011-05-29 13:50:05 [INFO] Preparing spawn area: 8%
2011-05-29 13:50:05 [INFO] Preparing start region for level 1
2011-05-29 13:50:05 [INFO] Done (5669243137ns)! For help, type "help" or "?"
2011-05-29 13:50:05 [INFO] Stopping server
2011-05-29 13:50:05 [INFO] Saving chunks
2011-05-29 13:50:05 [INFO] Saving chunks
2011-05-29 13:50:45 [INFO] Starting minecraft server version Beta 1.6.5
2011-05-29 13:50:45 [INFO] Loading properties
2011-05-29 13:50:45 [INFO] Starting Minecraft server on *:25565
2011-05-29 13:50:45 [INFO] Preparing level "Wyrmwood"
2011-05-29 13:50:45 [INFO] Preparing start region for level 0
2011-05-29 13:50:46 [INFO] Preparing spawn area: 57%
2011-05-29 13:50:46 [INFO] Preparing start region for level 1
2011-05-29 13:50:47 [INFO] Preparing spawn area: 56%
2011-05-29 13:50:47 [INFO] Done (2831369614ns)! For help, type "help" or "?"
2011-05-29 13:50:48 [SEVERE] Unexpected exception
java.lang.NullPointerException
at ll.o_(SourceFile:128)
at dh.a(SourceFile:1160)
at dn.a(SourceFile:43)
at dh.g(SourceFile:1136)
at dh.e(SourceFile:1115)
at net.minecraft.server.MinecraftServer.h(SourceFile:374)
at net.minecraft.server.MinecraftServer.run(SourceFile:307)
at bo.run(SourceFile:422)
2011-05-29 13:51:02 [INFO] Stopping server
2011-05-29 13:51:02 [INFO] Saving chunks
2011-05-29 13:51:02 [INFO] Saving chunks
2011-05-29 13:57:49 [INFO] Starting minecraft server version Beta 1.6.5
2011-05-29 13:57:49 [INFO] Loading properties
2011-05-29 13:57:49 [INFO] Starting Minecraft server on *:25565
2011-05-29 13:57:49 [INFO] Preparing level "Wyrmwood"
2011-05-29 13:57:49 [INFO] Preparing start region for level 0
2011-05-29 13:57:50 [INFO] Preparing spawn area: 36%
2011-05-29 13:57:51 [INFO] Preparing start region for level 1
2011-05-29 13:57:51 [INFO] Preparing spawn area: 0%
2011-05-29 13:57:52 [INFO] Preparing spawn area: 85%
2011-05-29 13:57:52 [INFO] Done (3400467715ns)! For help, type "help" or "?"
2011-05-29 13:57:52 [SEVERE] Unexpected exception
java.lang.NullPointerException
at ll.o_(SourceFile:128)
at dh.a(SourceFile:1160)
at dn.a(SourceFile:43)
at dh.g(SourceFile:1136)
at dh.e(SourceFile:1115)
at net.minecraft.server.MinecraftServer.h(SourceFile:374)
at net.minecraft.server.MinecraftServer.run(SourceFile:307)
at bo.run(SourceFile:422)
2011-05-29 13:57:57 [INFO] Stopping server
2011-05-29 13:57:57 [INFO] Saving chunks
2011-05-29 13:57:57 [INFO] Saving chunks
2011-05-29 14:04:29 [INFO] Starting minecraft server version Beta 1.6.5
2011-05-29 14:04:29 [INFO] Loading properties
2011-05-29 14:04:29 [INFO] Starting Minecraft server on *:25565
2011-05-29 14:04:29 [INFO] Preparing level "Wyrmwood"
2011-05-29 14:04:29 [INFO] Preparing start region for level 0
2011-05-29 14:04:30 [INFO] Preparing spawn area: 77%
2011-05-29 14:04:30 [INFO] Preparing start region for level 1
2011-05-29 14:04:31 [INFO] Preparing spawn area: 81%
2011-05-29 14:04:31 [INFO] Done (2290285493ns)! For help, type "help" or "?"
2011-05-29 14:04:31 [SEVERE] Unexpected exception
java.lang.NullPointerException
at ll.o_(SourceFile:128)
at dh.a(SourceFile:1160)
at dn.a(SourceFile:43)
at dh.g(SourceFile:1136)
at dh.e(SourceFile:1115)
at net.minecraft.server.MinecraftServer.h(SourceFile:374)
at net.minecraft.server.MinecraftServer.run(SourceFile:307)
at bo.run(SourceFile:422)
2011-05-29 14:04:34 [INFO] Stopping server
2011-05-29 14:04:34 [INFO] Saving chunks
2011-05-29 14:04:34 [INFO] Saving chunks

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Sorry I had to paste the log but I was unable to upload the server.log