Filename with initial minus/dash/hyphen

[gwen_goodnight]

My repository on a Linux workstation (Red Hat Enterprise 3.0)
Concurrent Versions System (CVS) 1.11.2 (client/server)

Some of my developers are using Windows workstations with WinCVS to access the
repository.
Everything works fine, except that the developers have a couple of files whose 
filename
starts with a minus sign. (Too late to change the file names)
The initial add and commit are OK, but when the file is changed,
cvs commit will fail during the difference processing.

cvs commit -m "test errorz" -- -X_test.sn3 (in directory C:\Documents and
Settings\mjmix\dev\)
Checking in -X_test.sn3;
/home/cm/DEV_CVS_ROOT/dev/-X_test.sn3,v  <--  -X_test.sn3
cvs server: _test.sn3: No such file or directory
cvs [server aborted]: error diffing -X_test.sn3

***** CVS exited normally with code 1 *****

Thanks,
--Gwen