Failed to convert world

So I just downloaded the Minecraft 1.2.3 R0.1 Beta Build(#2034) because i wanted to update my server,all my users ask that,but then i stumbled across a problem.I started my server with no plugins to ensure that everything works.When I started my MC server,Craftbukkit began to update my world but it failed.Here is the server.log.I used WorldBorder to limit my map size to 2000x2000 blocks.

Code:

2012-03-04 19:10:17 [INFO] Starting minecraft server version 1.2.3
2012-03-04 19:10:17 [INFO] Loading properties
2012-03-04 19:10:17 [INFO] Starting Minecraft server on *:25565
2012-03-04 19:10:17 [INFO] This server is running CraftBukkit version git-Bukkit-1.1-R6-33-gb66156b-b2034jnks (MC: 1.2.3) (Implementing API version 1.2.3-R0.1)
2012-03-04 19:10:18 [INFO] Preparing level "world"
2012-03-04 19:10:18 [INFO] Converting map!
2012-03-04 19:10:18 [INFO] Scanning folders...
2012-03-04 19:10:18 [INFO] Total conversion count is 1390
2012-03-04 19:10:18 [INFO] ----- Bukkit Auto Updater -----
2012-03-04 19:10:18 [INFO] It appears that you're running a Beta Build, when you've specified in bukkit.yml that you prefer to run Recommended Builds.
2012-03-04 19:10:18 [INFO] If you would like to be kept informed about new Beta Build releases, it is recommended that you change 'preferred-channel' in your bukkit.yml to 'beta'.
2012-03-04 19:10:18 [INFO] With that set, you will be told whenever a new version is available for download, so that you can always keep up to date and secure with the latest fixes.
2012-03-04 19:10:18 [INFO] If you would like to disable this warning, simply set 'suggest-channels' to false in bukkit.yml.
2012-03-04 19:10:18 [INFO] ----- ------------------- -----
2012-03-04 19:10:19 [INFO] Converting... 3%
2012-03-04 19:10:20 [INFO] Converting... 7%
2012-03-04 19:10:21 [INFO] Converting... 10%
2012-03-04 19:10:22 [INFO] Converting... 14%
2012-03-04 19:10:23 [INFO] Converting... 17%
2012-03-04 19:10:24 [INFO] Converting... 21%
2012-03-04 19:10:25 [INFO] Converting... 24%
2012-03-04 19:10:26 [INFO] Converting... 28%
2012-03-04 19:10:27 [INFO] Converting... 31%
2012-03-04 19:10:28 [INFO] Converting... 35%
2012-03-04 19:10:29 [INFO] Converting... 38%
2012-03-04 19:10:30 [INFO] Converting... 42%
2012-03-04 19:10:31 [INFO] Converting... 45%
2012-03-04 19:10:32 [INFO] Converting... 49%
2012-03-04 19:10:33 [INFO] Converting... 52%
2012-03-04 19:10:33 [SEVERE] java.lang.IndexOutOfBoundsException: Index: 1, Size: 1
2012-03-04 19:10:33 [SEVERE]    at java.util.ArrayList.RangeCheck(Unknown Source)
2012-03-04 19:10:33 [SEVERE]    at java.util.ArrayList.set(Unknown Source)
2012-03-04 19:10:33 [SEVERE]    at net.minecraft.server.RegionFile.<init>(SourceFile:129)
2012-03-04 19:10:33 [SEVERE]    at net.minecraft.server.WorldLoaderServer.a(SourceFile:183)
2012-03-04 19:10:33 [SEVERE]    at net.minecraft.server.WorldLoaderServer.a(SourceFile:169)
2012-03-04 19:10:33 [SEVERE]    at net.minecraft.server.WorldLoaderServer.convert(SourceFile:128)
2012-03-04 19:10:33 [SEVERE]    at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:223)
2012-03-04 19:10:33 [SEVERE]    at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:187)
2012-03-04 19:10:33 [SEVERE]    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:425)
2012-03-04 19:10:33 [SEVERE]    at net.minecraft.server.ThreadServerApplication.run(SourceFile:490)
2012-03-04 19:10:33 [SEVERE] Unexpected exception
java.lang.IndexOutOfBoundsException: Index: 1, Size: 1
    at java.util.ArrayList.RangeCheck(Unknown Source)
    at java.util.ArrayList.set(Unknown Source)
    at net.minecraft.server.RegionFile.<init>(SourceFile:129)
    at net.minecraft.server.WorldLoaderServer.a(SourceFile:183)
    at net.minecraft.server.WorldLoaderServer.a(SourceFile:169)
    at net.minecraft.server.WorldLoaderServer.convert(SourceFile:128)
    at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:223)
    at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:187)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:425)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:490)
2012-03-04 19:10:48 [INFO] Stopping server
2012-03-04 19:10:48 [SEVERE] java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
2012-03-04 19:10:48 [SEVERE]    at java.util.ArrayList.RangeCheck(Unknown Source)
2012-03-04 19:10:48 [SEVERE]    at java.util.ArrayList.get(Unknown Source)
2012-03-04 19:10:48 [SEVERE]    at net.minecraft.server.MinecraftServer.stop(MinecraftServer.java:411)
2012-03-04 19:10:48 [SEVERE]    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:482)
2012-03-04 19:10:48 [SEVERE]    at net.minecraft.server.ThreadServerApplication.run(SourceFile:490)

Has anybody else had this issue?I don't want to start a new map,this one is so awesome and I want to keep it.

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EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

I have the same problem with three of my maps , I tried converting it using Single Player (For the older versions, it usually works.) but Minecraft just crashes, many people say it's a glitch so my advice to you is keep the save file.

My server website: minecrafttf2server.yolasite.com

 

Has anybody found a fix for this?Or any other way to update the map?Because the client also crashes even if I try to update the map in SP.