cygwin xclock on XP crashes remote Windows 2003 file server

[Scott, Tereus]

Installed cygwin today - all packages.
My Windows XP machine has the H: drive mapped to a Windows 2003 file server.
After starting Xwin, I tried to test it by launching xclock. 
This caused the file server to crash!
Any ideas why? Has anyone seen this problem before?

cygwin release downloaded april 27/05  from http://www.mirror.ac.uk/sites/sources.redhat.com/ftp/cygwin/

cygwin-1.5.16.1

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