GLib-GObject-WARNING **: invalid unclassed pointer in cast to `GstMiniObject'
aborting...

Program received signal SIGABRT, Aborted.
[Switching to Thread 0xb7d856b0 (LWP 29181)]
0xb7f2c410 in __kernel_vsyscall ()
(gdb) bt
#0  0xb7f2c410 in __kernel_vsyscall ()
#1  0xb7db0f75 in raise () from /lib/tls/i686/cmov/libc.so.6
#2  0xb7db28f1 in abort () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7bcae1a in g_logv () from /usr/lib/libglib-2.0.so.0
#4  0xb7bcae59 in g_log () from /usr/lib/libglib-2.0.so.0
#5  0xb7c6e9d3 in g_type_check_instance_cast ()
   from /usr/lib/libgobject-2.0.so.0
#6  0xb6143ac1 in gnl_composition_reset (comp=0x8373120)
    at gnlcomposition.c:421
#7  0xb6143e59 in gnl_composition_change_state (element=0x8373120, 
    transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gnlcomposition.c:1215
#8  0xb6c9a9c7 in gst_element_change_state (element=0x8373120, 
    transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstelement.c:2425
#9  0xb6c9af13 in gst_element_set_state_func (element=0x8373120, 
    state=GST_STATE_READY) at gstelement.c:2375
#10 0xb6c99a73 in gst_element_set_state (element=0x8373120, 
    state=GST_STATE_READY) at gstelement.c:2278
#11 0xb6c8ba1c in gst_bin_change_state_func (element=0x8fbea28, 
    transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstbin.c:1933
#12 0xb6c9a9c7 in gst_element_change_state (element=0x8fbea28, 
    transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstelement.c:2425
#13 0xb6c9af13 in gst_element_set_state_func (element=0x8fbea28, 
    state=GST_STATE_READY) at gstelement.c:2375
---Type <return> to continue, or q <return> to quit---
#14 0xb6c99a73 in gst_element_set_state (element=0x8fbea28, 
    state=GST_STATE_READY) at gstelement.c:2278
#15 0xb6c8ba1c in gst_bin_change_state_func (element=0x8fbe8b8, 
    transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstbin.c:1933
#16 0xb6c9a9c7 in gst_element_change_state (element=0x8fbe8b8, 
    transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstelement.c:2425
#17 0xb6c9af13 in gst_element_set_state_func (element=0x8fbe8b8, 
    state=GST_STATE_READY) at gstelement.c:2375
#18 0xb6c99a73 in gst_element_set_state (element=0x8fbe8b8, 
    state=GST_STATE_READY) at gstelement.c:2278
#19 0xb6c8ba1c in gst_bin_change_state_func (element=0x8a97140, 
    transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstbin.c:1933
#20 0xb6cba707 in gst_pipeline_change_state (element=0x8a97140, 
    transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstpipeline.c:463
#21 0xb6c9a9c7 in gst_element_change_state (element=0x8a97140, 
    transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstelement.c:2425
#22 0xb6c9a665 in gst_element_continue_state (element=0x8a97140, 
    ret=GST_STATE_CHANGE_SUCCESS) at gstelement.c:2132
#23 0xb6c9aae1 in gst_element_change_state (element=0x8a97140, 
    transition=GST_STATE_CHANGE_PLAYING_TO_PAUSED) at gstelement.c:2462
#24 0xb6c9af13 in gst_element_set_state_func (element=0x8a97140, 
    state=GST_STATE_READY) at gstelement.c:2375
#25 0xb6c99a73 in gst_element_set_state (element=0x8a97140, 
---Type <return> to continue, or q <return> to quit---
    state=GST_STATE_READY) at gstelement.c:2278
#26 0xb6d7e3b3 in _wrap_gst_element_set_state (self=0x8c21aa4, args=0x8c4282c, 
    kwargs=0x0) at gstelement.override:71
#27 0x080c99b3 in PyEval_EvalFrameEx (f=0x91e2c84, throwflag=0)
    at ../Python/ceval.c:3573
#28 0x080c95e5 in PyEval_EvalFrameEx (f=0x8fbbc2c, throwflag=0)
    at ../Python/ceval.c:3659
#29 0x080c95e5 in PyEval_EvalFrameEx (f=0x91e3ad4, throwflag=0)
    at ../Python/ceval.c:3659
#30 0x080cb0f7 in PyEval_EvalCodeEx (co=0x85f1188, globals=0x859ccec, 
    locals=0x0, args=0x91a0cb4, argcount=1, kws=0x91a0cb8, kwcount=0, 
    defs=0x85fd9d8, defcount=2, closure=0x0) at ../Python/ceval.c:2836
#31 0x080c92fe in PyEval_EvalFrameEx (f=0x91a0b74, throwflag=0)
    at ../Python/ceval.c:3669
#32 0x080cb0f7 in PyEval_EvalCodeEx (co=0x83a5578, globals=0x83a42d4, 
    locals=0x0, args=0x8793798, argcount=2, kws=0x0, kwcount=0, 
    defs=0x87b3d18, defcount=1, closure=0x0) at ../Python/ceval.c:2836
#33 0x08113450 in function_call (func=0x87e5614, arg=0x879378c, kw=0x0)
    at ../Objects/funcobject.c:517
#34 0x0805cb37 in PyObject_Call (func=0x71fd, arg=0x879378c, kw=0x0)
    at ../Objects/abstract.c:1861
#35 0x08062b9b in instancemethod_call (func=0x87e5614, arg=0x879378c, kw=0x0)
    at ../Objects/classobject.c:2519
---Type <return> to continue, or q <return> to quit---
#36 0x0805cb37 in PyObject_Call (func=0x71fd, arg=0x8bf7b2c, kw=0x0)
    at ../Objects/abstract.c:1861
#37 0x080c2d9c in PyEval_CallObjectWithKeywords (func=0x878bcfc, 
    arg=0x8bf7b2c, kw=0x0) at ../Python/ceval.c:3442
#38 0x0805cfe0 in PyObject_CallObject (o=0x878bcfc, a=0x8bf7b2c)
    at ../Objects/abstract.c:1852
#39 0xb7caf8cb in ?? ()
   from /var/lib/python-support/python2.5/gtk-2.0/gobject/_gobject.so
#40 0x0878bcfc in ?? ()
#41 0x08bf7b2c in ?? ()
#42 0x087e42ac in ?? ()
#43 0x00100002 in ?? ()
#44 0x08fbccfc in ?? ()
#45 0x00000001 in ?? ()
#46 0x08bf7b2c in ?? ()
#47 0xb7c82680 in ?? () from /usr/lib/libgobject-2.0.so.0
#48 0xb7caf7c0 in ?? ()
   from /var/lib/python-support/python2.5/gtk-2.0/gobject/_gobject.so
#49 0x08881260 in ?? ()
#50 0xbfb76518 in ?? ()
#51 0xb7c51759 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
Backtrace stopped: frame did not save the PC