unrecognized response `ksh: cvs: not found' from cvs server

[Robert J. Feller]

I'm having a strange problem that I've exhausted all possible tests on -- it may be a bug, so I'm hoping that this is the best place to post.

I am running WinCVS on a W2K machine (lime) and communicating with a CVS respository on HP-UX (mango).  I am using ".rhosts" authentication, and everything works great if I am user "ape" on lime (CVSROOT = ape@mango:/user1/REPOSITORY).  However, if I switch to a user "monkey" (CVSROOT = monkey@mango:/user1/REPOSITORY) or any other user on lime, I get the following error message when trying to do anything in WinCVS (e.g., checkout):

cvs checkout -P lib (in directory C:\proj1)
cvs checkout: warning: unrecognized response `ksh: cvs:  not found' from cvs server
cvs [checkout aborted]: end of file from server (consult above messages if any)

I can get things to work (although lousy) staying logged in on lime as "monkey" but changing CVSROOT = ape@mango:/user1/REPOSITORY.  However, it's then as if "monkey" is really "ape" (e.g., all subsequent file commits are marked with "ape").  Note that any other user (other than "ape") has the above problem using WinCVS (on any W2K machine in our area).

What is it about the "ape" account on Windows or HP-UX that makes it always work and the other accounts fail?

Note that cvs works great on everyone's account on mango.  I have the following .rhosts file on that machine:

lime ape
lime monkey

I am using the following versions:

WinCVS: 1.2
CVS: 1.9
RCS: 5.7
Windows 2000 (Client)
HP-UX 11.0 (Server)

Thanks in advance for any help on this.