In XFree, WIN-E to start Windows Exporer causes taskbar hang

[Nikolaus Bates-Haus]

I didn't see anything about this in the mailing list archives:
Cygwin/XFree 4.2.0 (and prior versions)
Cygwin DLL 1.3.9 (and prior versions)
When I try to open a Windows Explorer using the Win-E keyboard shortcut
(Windows key, E), the explorer window doesn't open and the taskbar freezes.
I can still Alt-TAB between applications, and start things from the desktop,
but can't do a thing with the taskbar.
After a long time (1/2 hour to an hour; not sure if it's the length of time
or me doing something) Explorer will start, and the taskbar will come back.

This ONLY happens when Cygwin has keyboard focus.
It only happens when using the keyboard shortcut; starting from the start
menu, desktop or existing window doesn't do it.
Once it happens, I can still start Windows Explorer from the desktop.
Don't know about other keyboard shortcuts.

-nik