Gvim crashing in xmonad

If I start gvim in an xterm in xmonad, gvim always crashes when I try to
close it.

The following messages appear:

----------------------------------------------------------------------------------------------
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
[xcb] Aborting, sorry about that.
gvim: ../../src/xcb_io.c:273: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed.

Vim: Caught deadly signal ABRT

Press ENTER or type command to continueVim: Finished.
-----------------------------------------------------------------------------------------

If I use vim instead of gvim, everything is normal. If I use "gvim &" or
start gvim from a menu (dmenu), everything works correctly.

Any clues to what is happening here?

--
Anthony Campbell - ac@acampbell.org.uk
Microsoft-free zone - Using Debian GNU/Linux
http://www.acampbell.org.uk - sample my ebooks at
http://www.smashwords.com/profile/view/acampbell

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