I just had that problem here trying to reply to this thread. I too am getting complaints about members not being able to stay logged in.

I notice this is an issue for myself when I switch between an ID with admin privileges and a typical member ID but figured it was just related to logging out and back in again right away.

We have multiple domains pointing to the same site, I don't think that is an issue but...some members use www.bhweb.com and others use www.barnegatfishinhole.com

Thanks,
Joe