Emacs crashing when right-clicking in VM

[Patrick May]

     I've just built Emacs 21.3.1 with the --with-x-toolkit=motif
after installing the latest Lesstif on Mandrake Linux 10.0.
Everything seems to be working fine except that right-clicking on an
attachment in vm gives the following error and Emacs crashes:

     X protocol error: BadAccess (attempt to access private resource
     denied) on protocol request 28

Any ideas?

Thanks,

Patrick

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