Soooo Iv had this problem before. I had a book once, and I did the clear inventory command and it solved the problem. But I'm in another situation now. So basically, I was online about a week ago. And I was building and someone tp'ed to me. They dropped a stick.. Called "The Magical Tampon" (yeah..).. And I got it and.. I'm stuck on a block.. Iv tried everything..
so the item you got is a crash item. Its 10 times worse than the death item due to the fact if you move you crash. I have the same situation ,but i can at-least move now. What you do is tp to a friend and have them burn you to death with lava or something. Then when u respawn don't move and do /ci a few times then /bukkit:kill . When you respawn don't move ,but make it so your flying when your flying you should be able to move without crashing just don't try to walk or run. Also tell a mod to add you to the creative reset list if u don't mind losing your plot.
http://www.mineverse.com/threads/player-reset-list-creative.20753/#post-200339 READ MY POST THROUGHTLY Hope I helped a little bit
