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For anyone with a Minecraft server you know that you don't feel safe till updating to a Bukkit recommend build to ensure best quality. With the info below this will surely get your server up and stable other than the recent beta builds. Hope this information is in-tune and helpful to you fellow minecraftians. All credits to "EvilSeph", a Craftbukkit developer for the update and info log. To update check out the original post here: [ Register or Signin to view external links. ]

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A new CraftBukkit Recommended Build 1.2.4-R1.0 (#2126) that provides Minecraft 1.2.4 compatibility, many bug fixes and critical (crash) exploit fixes is now available. As always, please remember to backup your servers before updating, just in case. As this is our first 1.2 Recommended Build, updating is highly recommended.

Will plugins break with this build?
Unless the plugin developers of your plugins have been keeping up with Bukkit development, plugins will most likely be broken due to the recent optimisation and cleaning of our code. However, if the plugins you use have already been updated to work with at least 1.1-R7 or 1.2.3-R0.1, then you should be fine.

What is a Recommended Build?
A Recommended Build has gone through extensive testing and should not have any known issues. These builds are for Server Admins who want peace of mind when updating their server to the latest Minecraft update. We'll do our best to ensure that Recommended Builds only have completed features and completed API before being promoted, though we cannot ensure that a Recommended Build will have all the API needed to fully utilise newly added features in a Minecraft update. Although we go through great pains to ensure that these builds will not cause any issues, we highly advise you test them on a test server before deploying to production. Recommended Builds are naturally promoted after several Beta Builds have been promoted, and thus are promoted less frequently than Beta Builds.

To summarise, a Recommended Build:
Has been extensively and thoroughly tested, so should not contain any major or minor bugs. However, we can't provide any guarantees as there is no possible way for us to be aware of all issues before they are discovered.
Has complete features.
Has complete API.
However, may not have all the API or features to cover what is added by a Minecraft update.
Is naturally promoted after several Beta Builds have been promoted.
Will be promoted if we find issues in a previous Recommended Build.
Known Issues:
None
For more detailed information on what is contained in this update, please see the changelog below.

Change-Log:

BUKKIT-329: MobSpawner should retains durability/data values.
BUKKIT-868: Add BlockChangeDelegate.isEmpty method
BUKKIT-874: Custom generator needs to use the new chunk format
BUKKIT-1094: Obey the result of world.addEntity when consuming blocks used in spawning an iron golem or snowman
BUKKIT-1113: Help should allow the amendment of topic permissions in help.yml
BUKKIT-1178: Allows server admins to ignore whole plugins from help using help.yml
BUKKIT-1180: Create plugin-level sub-indexes that list only the commands from a single plugin
BUKKIT-1189: Add option to exclude command help topics from default help index
BUKKIT-1191: Add color code support to help.yml
BUKKIT-1193: Add search to help
BUKKIT-1244: New DamageCause MELT for Snowmen
BUKKIT-1246: A way to start inventory iteration in the middle?
BUKKIT-1263: Add method for creating custom index topics in help.yml
BUKKIT-1264: Add option to completely disable automatic help topic generation
New Features
BUKKIT-15: API for Item data
BUKKIT-284: Projectile Launch Event
BUKKIT-397: BLOCK_BREAK event needs a method to get (and set) the drops
BUKKIT-858: Add method to check if the player is blocking
BUKKIT-872: New 1.2 entities need to be created
BUKKIT-885: Ocelot API needs to be added
BUKKIT-887: Villager API needs to be expanded upon
BUKKIT-888: Create EXP bottle API (thrown entity)
BUKKIT-984: Ability to get hostname a player logged in with
BUKKIT-1075: Add Chunk API to set biome ID per x/z coordinate.
BUKKIT-1232: Villagers cannot have their age modified
BUKKIT-1247: A way to get a single chest inventory from a double chest BlockState
BUKKIT-1274: Make the connection throttle configurable and disable-able (useful for testing).
BUKKIT-1281: Add methods to toggle or check if a player is in flight
Fixed Bugs
BUKKIT-147: Entity damage events firing multiple times?
BUKKIT-478: PlayerPortalEvent does not fire when leaving the end
BUKKIT-517: Sticky piston rail dupe bug
BUKKIT-602: Enchantments lost on crafting recipe output
BUKKIT-610: Right Click Item Disappear
BUKKIT-658: Enderpearl's do not check the world
BUKKIT-794: 1.1-R4 spawn-animals not working
BUKKIT-855: Generate Structures and Level Type Getters For Server.java
BUKKIT-866: java.lang.NoSuchMethodError in net.minecraft.server.WorldGenMegaTree.setTypeAndData
BUKKIT-871: Biome Generation - Possible Issue?
BUKKIT-886: 4 Jungle Tree Sapplings do not make a Tall Jungle Tree when using bonemeal
BUKKIT-889: World height bug
BUKKIT-890: I often have this issue : java.lang.ArrayIndexOutOfBoundsException
BUKKIT-897: Crash in build 2000
BUKKIT-901: chest.getInventory() doesn't return a DoubleChestInventory if the chest is a double chest
BUKKIT-907: Hunger bar draining to 0%
BUKKIT-914: [Creative Mode] Can't remove fire without destroying the block
BUKKIT-915: Can't place blocks on long grass to replace it
BUKKIT-921: No mobs spawn.
BUKKIT-922: Internal Server error on connect (CB 1.2.3-R0.1 #2017)
BUKKIT-931: Canceling EntityExplodeEvent still damages nearby players
BUKKIT-934: leaf blocks do not decay after harvesting wood from trees
BUKKIT-935: EntityTargetEvent does not arrive.
BUKKIT-943: Hostile mobs do not burn in sunlight
BUKKIT-945: Minor spelling error in help.yml (PR)
BUKKIT-948: None
BUKKIT-960: Cant enter minecarts thet is left on rail after reentering game
BUKKIT-970: onBlockIgnite can't be cancelled.
BUKKIT-976: Nether is buggy
BUKKIT-980: EntityMinecraft has behavior seperate from vanilla
BUKKIT-986: Conversations API escape sequence does not support commands.
BUKKIT-991: Worlds loaded by the WorldCreator are not converted.
BUKKIT-995: getHolder() from an double chest results in null
BUKKIT-1002: Can't place water in the End in SMP
BUKKIT-1010: Ocelots and Iron Golems do not fire EntityDeathEvent
BUKKIT-1014: World.RefreshChunk() does not refresh the chunk.
BUKKIT-1027: HelpTopicFactory should accept custom CommandExecutor implementations
BUKKIT-1028: Help does not acknowledge command aliases
BUKKIT-1040: Maps crashing clients on teleport between them (example server inside)
BUKKIT-1043: Crash when emptying cursor into and onInventoryClick() event
BUKKIT-1054: Wolves Not Firing EntityDamageByEntity events
BUKKIT-1056: Ender pearl teleportation causes player to face opposite direction
BUKKIT-1059: Chunk.getEntities() does not return entity if entity is higher than 128
BUKKIT-1060: Chunk unload event is spammed
BUKKIT-1061: Exit portal in the End always teleports player to original spawn instead of last bed
BUKKIT-1076: Cannot set ItemStack amount above 64 in chests with InventoryClickEvent
BUKKIT-1086: CraftBukkit does not send a playerInteractEvent when the left-click was made on block protected by spawn protection (again, because the first one was closed)
BUKKIT-1089: CreatureSpawn event does not fire for iron golems
BUKKIT-1090: Zombie invasions do not trigger any events
BUKKIT-1100: Fire arrows still affect entities if the EntityDamageEvent was cancelled
BUKKIT-1104: Sheep eating grass no longer fires an event due to the new AI
BUKKIT-1105: The new rare drops are not accounted for in EntityDeath events.
BUKKIT-1109: EntityTame events are no longer fired.
BUKKIT-1111: Feeding a wolf does not fire an EntityRegainHealth event.
BUKKIT-1112: Inventory craft event CraftItemEvent never gets called
BUKKIT-1115: Endermen don't spawn in the End.
BUKKIT-1119: Enchanting in creative should not require experience.
BUKKIT-1123: Zombie village invasions do not obey spawn-monsters setting.
BUKKIT-1124: Iron Golems spawning to defend a village do not respect spawn-animals setting.
BUKKIT-1125: Hiding a player from themselves results in packet loss
BUKKIT-1129: Silverfish attacking entities does not throw EntityDamageEvent
BUKKIT-1130: BlockStateListPopulator in EntityEnderDragon is not being populated.
BUKKIT-1133: Creeper death event doesn't report music disk
BUKKIT-1134: Zombies does not fire EntityChangeBlockEvent when breaking doors
BUKKIT-1140: testHostNotFound unit test fails on OpenDNS name servers
BUKKIT-1146: Using setAllowFlight doesn't do anything.
BUKKIT-1159: No way to check if two enchantments conflict
BUKKIT-1161: Not all TreeType trees can be generated with generateTree
BUKKIT-1163: Redstone ore not fully tied to PlayerInteractEvent
BUKKIT-1164: Snowmen do not fire entity damage events when melting.
BUKKIT-1165: Snowmen do not fire entity damage events when in rain or water.
BUKKIT-1181: Custom inventories cause large amounts of fake items
BUKKIT-1182: Non-player entities stepping on redstone ore do not fire events.
BUKKIT-1183: Logging into a server in Creative mode after logging out in Creative mode makes stepping onto blocks no longer register.
BUKKIT-1188: Skeletons burning in sunlight no longer raise the onEntityCombust event
BUKKIT-1190: Custom inventory views don't properly handle certain style changes
BUKKIT-1198: Inventory.addItem() multiplies stacks
BUKKIT-1209: CraftingInventory.getHolder() returns null
BUKKIT-1229: Iron Golems won't target player
BUKKIT-1248: openInventory does not work for custom inventories
BUKKIT-1250: Don't fire CraftItemEvent for a click on an empty result slot
BUKKIT-1252: Add method to get/set drops for shearing entities and for destroying paintings and vehicles
BUKKIT-1253: StackOverflowError when passing nonexistant command to /help
BUKKIT-1273: destroyed boats drop a minecart
BUKKIT-1275: /version disconnects client with string too long error
BUKKIT-1278: NPE callBlockBreakEvent
BUKKIT-1279: Network Listner Error during startup
BUKKIT-1292: Removing a block underneath a door causes the door to vanish.
BUKKIT-1295: Block.breakNaturally() removes block, but does not spawn item drop
BUKKIT-1297: No saplings from Trees - tested on both Birch and standard
BUKKIT-1299: Dupe items
BUKKIT-1302: Fly kick, even if canFly is set
BUKKIT-1304: Infinite TNT / TNT Dupe
BUKKIT-1310: Block.breakNaturally() duplication
BUKKIT-1314: Cannot craft snow block from snowballs gathered legit
BUKKIT-1332: Potion of Harming causes no direct damage, throws a wrong EDBEE
BUKKIT-1333: Ocelot and cats dropping leather
BUKKIT-1336: Magma Cubes occasionally drop Magma Cream that can't be picked up
BUKKIT-1348: Snowballs no longer trigger a DamageEvent when hitting a player (it does for mobs)
BUKKIT-1351: Fired arrow increases Entity id instead of ticks lived
BUKKIT-1356: Animal Breeding firing event with inappropriate parameters