Problem:
BO3 tile entities do not load from .nbt files (v2.4.8 and Craftbukkit 1.5 dev build)

Steps to reproduce:

1. Make a local bukkit server using Craftbukkit 1.5-R0.1 dev build #2581, TerrainControl v2.4.8, Multiverse 2.4 AB.
2. Boot the server and create a new world called "apoc" using http://flyingislands.net/dumptruck/bugs/apoc.zip . This world contains we-doomport.bo3 that was made using bo3tools, and two .nbt files used using powerNBT to create them, "7z.exe a -tgzip" to make them gzipped, and NBTEdit.exe to put all the tags under the "Data" compound tag (why powerNBT doesn't do all this for you is beyond me. I wish bo3 tools did this automatically.)
3. Browse the world. There are obsidian portals all over the shallow sea. The signs on them should have text from newsign.nbt, but they don't. The chests don't contain any of the items from newchest.nbt either. Looks like http://flyingislands.net/dumptruck/bugs/2013-03-19_00.27.09.png .
4. Use "/tc spawn we-doomport" to make a new portal. Now the signs have their proper text, but the chest is still empty. See http://flyingislands.net/dumptruck/bugs/2013-03-19_00.27.28.png

Let me know whether you think this is a dev build bug so I can pass this along to the bukkit guys. I'd like to get this working as soon as possible...

This doesn't happen on 1.4.7, and it does on 1.5. It could be a CraftBukkit issue, but it is more likely that TC is doing something wrong, otherwise vanilla worlds would have the same issue.

For what's worth it: it doesn't happen on the Forge version... However, that version has problems with rotations.

It looks like I fixed the problem. Now to fix the rotation issues.

Oh, and here is a build with the bugfix. Bukkit+Forge.