I use Firefox 3, and Avira AntiVir for my antivirus.

When I go to a site, say Rapidshare, I put in my login and password. Firefox asks if I want to save the login info and I say yes.

As long as my machine isn't shut down or rebooted, the login info is remembered. As soon as I reboot or shut down/turn on my machine, the login info is forgotten and I have to reenter in.

This just started happening within the past month or so. Any ideas?