These changes only affect development builds. Spigot build 249 is based on the latest CraftBukkit Beta and as such is the build which should be used.
Plugins will update and these changes will be better for everyone in the long run.

Sorry guys, but I need to do this too keep myself sane, and to stop you from spamming the forums.
Over the last few builds there have been at least three breakages in the Bukkit API. These breakages are controlled completely by Bukkit, so there is nothing we can do about it. Your best defence is to update your plugins or downgrade to a build prior to the 1st of December 2012.

The first change which can be found at:
Details with the changing of the BlockFace / Direction enum. The fact that these directions, well point to the wrong directions, has been a common law feature pretty much since Bukkits inception. You may experience symptoms of this breakage if stuff is rotated oddly, or shop signs, and Lockette / Deadbolt locks do not function.
All plugins known to be affected by this breakage have updated.

The second change is affecting the most users, found at
This change alters the return type of the EntityBlockChange event. Any plugin using this simply needs a recompile. There are only about 60 plugins which will be affected by this change.
You can be reasonably sure any block logging plugin will be broken, as well as any protection plugin (WorldGuard)
The error will look something like: Caused by: java.lang.NoSuchMethodError: org.bukkit.event.entity.EntityChangeBlockEvent.getEntity()Lorg/bukkit/entity/LivingEntity;

The third change:
Only affects plugins which...
UPDATE: Server is back!

At this point in time, the Jenkins server appears to be down.
The host is showing no issues on their status page, so at this time I am thinking a malicious attack of some sort (DDOS, although that seems odd on a Jenkins server).
Hopefully it will come back some time whilst I am sleeping, but I'll make enquiries just in case.
This page is not frequently updated, please see the wiki instead:

Quick Links
  • IRC - Come to #spigot for support.
  • Builds - Downloads are over here
  • Source - If you want to check over stuff or just help out.
  • Bug Reports - Found an issue? It will only get fixed if you post it here.
I would like to thank everyone who has made Spigot possible over the last few months, it has been a great journey for everyone involved. Special mentions to andrewkm and the folks over at EcoCityCraft who have been my driving force. I would also like to say thanks @Afforess for his wonderful work in creating CraftBukkit++ which inspired me to create Spigot, and from whom I drew a lot of work from in the early days. Finally special mentions to the entire Bukkit team and the enormous amount of work they put into making the best Minecraft server API out there!

What is it?
Well put it simply, Spigot is it. Spigot is the "special sauce" used by many of the world's top Minecraft servers to ensure that they can cope with their huge player base, and ensure the satisfaction of their players, by reducing and eliminating many causes of lag. The end result is your server becomes a cut above the competition, and you no longer have to spend time tearing your hair out over players complaining of lag. You know your players are getting the best experience they can possibly be getting. As well as increases in player satisfaction and performance, Spigot includes some cool features, not possible via a Bukkit plugin, which help make server administration and caring for your...
This thread is for discussion about the 1.4.5-R0.3-x series of Spigot builds.
Builds in this series are numbered are numbered 250 and above and are based on CraftBukkit builds 2489 and above. You can view the CraftBukkit release notes here.

Notable CraftBukkit Changes (Updated 24/11/2012)
  • Provide spawn reason when using spawneggs to spawn babies
  • Prevent spawner eggs from being exploitable
Notable Spigot Changes (Updated 24/11/2012)
  • Revert changes to offline player listing - much faster
It has become increasingly difficult to manage the old Spigot thread over at Spout and coupled with the huge community of server owners seeking the best for their server, we have decided it is time to move away from them.

This is not bad news at all, because now we have a whole forum dedicated to server owners who wish to get the latest dirt on Spigot and share what makes their server tick. it is thanks to you guys that Spigot has grown into what it is today, and I would like to thank everyone who uses Spigot, whatever the reason may be. I hope you all recommend it to your friends and fellow server owners.

In the lifetime of Spigot, many users have made significant contributions to the project, and as such they can now have shiny ranks as well as your appreciation!

andrewkm - Benefactor of Spigot. It is because of him that Spigot was created. Almost everything you see here today, these forums, the Jenkins are because of Andrew's contributions. He owns EcoCityCraft, and I suggest you check them out!

ammar2 - Whilst not many contributions have been made yet, you can be sure something big is coming from him soon. Hint hint.

mbaxter - Thanks to his superb handling of the Spigot thread I have decided to appoint him moderator. Whilst I hope his job will be easy, this is my way of giving thanks to him and making sure you listen to what he says.

And finally Staminus Communications, who have kindly volunteered to host these forums.