Hi Timothy,
Have you resolved this yet? I could push some snapshots of the WinCVS and PuTTY configurations(for a sourceforge project) to you if it helps. One of the things that made WinCVS and PuTTY work together for me was saving the PuTTY configuration as a "Session" and use the session name as the host address in the WinCVS preference so that plink can use it.
I do not need to do this, for me it works as is. Maybe version dependent?
Joerg
