[nomadking]

I've recently experienced the same problem, although not immediately after upgrading to 3.6.8. Although it may have just been a coincidence, it happened after applying a MS update(XP security fix). The username/passwords were still 'remembered', so I didn't have to try to recall the details, but the cookies(I assume) that tells the sites to remain logged in, seem to have gone. This happened to all sites(eg Radio Times) that I use, not just CF. I'm not quite sure how the proposed solutions would help, as the problem was that you do not normally have to be logging in at all.