cvs [server aborted]: <file-name>,v is ambiguous

[Christian Schmitt]

Hi,
today I upgraded our CVS server on a Debian box to version 1.12.1
Since that time I get an error when checking out a project from that
machine:
cvs [server aborted]: Basis_Point_Value.htm,v is ambiguous; could mean
basis_point_value.htm,v or Basis_Point_Value.htm,v

This only happens when accessing the CVS repository from a windows
machine.
I tried with a Win32 version:
Concurrent Versions System (CVSNT) 1.11.1.3  (Build 57a)
(client/server)
as well as two Cygwin versions:
Concurrent Versions System (CVS) 1.12.1 (client/server)
and
Concurrent Versions System (CVS) 1.11.5 (client/server)

Checking out the project on the Linux box itself works fine as well as
working from a Solaris machine using:
Concurrent Versions System (CVS) 1.11 (client/server)


Thanks for any tips and/or hints.

Cheers,
Christian Schmitt