I've run my server, which was getting the same error through Tickthreading and got this being spammed:
2013-09-14 00:16:32 [SEVERE] [TickThreading] Exception ticking TileEntity c appeng.me.tile.TileController @472020958 in vipworld/5 at x, y, z: -2334, 102, -1440
java.lang.AbstractMethodError...