Something

ODE INTERNAL ERROR 2: geom must be placeable in dGeomSetPosition()
Stacktrace:

  at (wrapper managed-to-native) Ode.NET.d.GeomSetPosition (intptr,single,single,single) <0x00004>
  at (wrapper managed-to-native) Ode.NET.d.GeomSetPosition (intptr,single,single,single) <0xffffffff>
  at OpenSim.Region.Physics.OdePlugin.OdePrim.set_Position (OpenSim.Region.Physics.Manager.PhysicsVector) <0x000ce>
  at OpenSim.Region.Environment.Scenes.SceneObjectPart.set_GroupPosition (libsecondlife.LLVector3) <0x0005e>
  at OpenSim.Region.Environment.Scenes.SceneObjectGroup.set_AbsolutePosition (libsecondlife.LLVector3) <0x0014a>
  at OpenSim.Region.Environment.Scenes.SceneObjectGroup.UpdateGroupPosition (libsecondlife.LLVector3) <0x00027>
  at OpenSim.Region.Environment.Scenes.InnerScene.UpdatePrimPosition (uint,libsecondlife.LLVector3,OpenSim.Framework.IClientAPI) <0x00038>
  at OpenSim.Region.ClientStack.ClientView.MultipleObjUpdate (OpenSim.Framework.IClientAPI,libsecondlife.Packets.Packet) <0x001d0>
  at OpenSim.Region.ClientStack.ClientView.ProcessPacketMethod (libsecondlife.Packets.Packet) <0x00059>
  at OpenSim.Region.ClientStack.ClientView.ProcessInPacket (libsecondlife.Packets.Packet) <0x00061>
  at OpenSim.Region.ClientStack.ClientView.ClientLoop () <0x0009f>
  at OpenSim.Region.ClientStack.ClientView.AuthUser () <0x00244>
  at (wrapper delegate-invoke) System.MulticastDelegate.invoke_void () <0xffffffff>
  at (wrapper runtime-invoke) System.IO.StreamWriter.runtime_invoke_void (object,intptr,intptr,intptr) <0xffffffff>

Native stacktrace:

        mono [0x81ab4d7]
        mono [0x818e960]
        [0xffffe440]
        /lib/i686/cmov/libc.so.6(abort+0x101) [0xb7cc5181]
        ./libode.so(dDebug+0x3c) [0xb448f32c]
        ./libode.so(dGeomSetPosition+0x175) [0xb4491135]
        [0xb45513fc]
        [0xb59c7c2f]
        [0xb3a30997]
        [0xb59c79fb]
        [0xb59ca530]
        [0xb59ca381]
        [0xb59c9869]
        [0xb0fb5aa2]
        [0xb0fb1e32]
        [0xb0faaf78]
        [0xb4bb9315]
        [0xb6dccc80]
        [0xb6e5e0b9]
        mono [0x818e75c]
        mono(mono_runtime_invoke+0x29) [0x80b8aa0]
        mono(mono_runtime_delegate_invoke+0x6a) [0x80b9654]
        mono [0x80efc78]
        mono [0x8149305]
        mono [0x8162ee8]
        /lib/i686/cmov/libpthread.so.0 [0xb7e0b46b]
        /lib/i686/cmov/libc.so.6(clone+0x5e) [0xb7d6c72e]