After updating my server to Spigot 1.8.3 and updating TC to dev versions (tried build 75 and build 79) I keep getting this and the server shuts itself down on start up:

http://pastebin.com/0n3aZsps

And here:

http://pastebin.com/yHim3Ts2

This looks like the multiworld bug in Spigot, they fixed it a few builds ago.

If it is not that bug, could you post the output of /version so that I can try to reproduce it?

Edit: disregard that, I found the version hashsomewhere in the crash report, you're running the latest version of Spigot. Lets see if I can debug this.

Why did you revert it?

That makes sense.

Because later Spigot versions made this fix not needed anymore. This is a good thing, as the fix broke Multiverse.