The latest version of AmunRa does not work on servers because servers don't have LWJGL but the add-on requires it. Crash report: http://pastebin.com/5UFtTp2P

Removed it from everything non-client, should be fixed in next build

Doesn't the AmunRa class reference Vector3f when registering planets?

It did, which was a mistake. I changed it to the Vector3 class from micdoodle