On my box:

$ python
Python 2.5.1 (r251:54863, Oct 30 2007, 13:54:11)
[GCC 4.1.2 20070925 (Red Hat 4.1.2-33)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import clutter
python: xcb_lock.c:77: _XGetXCBBuffer: Assertion `((int) ((xcb_req) - (dpy->request)) >= 0)' failed.
2b91add9-c08a-de3f-2b1e9725-0b6cfecc is dumped
*** glibc detected *** python: corrupted double-linked list: 0x08eca220 ***


[1]+  Stopped                 python
[1]+  Killed                  python
$
$ ipython
Python 2.5.1 (r251:54863, Oct 30 2007, 13:54:11)
Type "copyright", "credits" or "license" for more information.

IPython 0.8.2 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object'. ?object also works, ?? prints more.

In [1]: import clutter
python: xcb_lock.c:77: _XGetXCBBuffer: Assertion `((int) ((xcb_req) - (dpy->request)) >= 0)' failed.
2818af0c-fb11-5da5-7d92f099-2197d4d4 is dumped

$ su -
# ipython
Python 2.5.1 (r251:54863, Oct 30 2007, 13:54:11)
Type "copyright", "credits" or "license" for more information.

IPython 0.8.2 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object'. ?object also works, ?? prints more.

In [1]: import clutter
python: xcb_lock.c:77: _XGetXCBBuffer: Assertion `((int) ((xcb_req) - (dpy->request)) >= 0)' failed.
Aborted
#

----------------------------------------------------------
other 2nd box:


In [1]: import clutter

** (/usr/bin/ipython:17048): WARNING **: failed to bind GLXGetProcAddress or GLXGetProcAddressARB

In [2]:
Do you really want to exit ([y]/n)? y
[swiftg@dolphin ~]$ python
Python 2.5.1 (r251:54863, Oct 30 2007, 13:54:11)
[GCC 4.1.2 20070925 (Red Hat 4.1.2-33)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import clutter

** (:17052): WARNING **: failed to bind GLXGetProcAddress or GLXGetProcAddressARB
>>>