I had to install a certificate for accessing the WLAN at school. That didn't go very well so I deleted the keychain. I didn't just delete that one, but every single one on the machine. I searched for topics on keychains and found a few posts on how to get them back, but I must've done something that didn't make that possible.
I had to install various certificates to get it all working again. Every once and a while I have to re-enter passwords for Adium, Mail, WLAN, etc. Selecting the option 'remember in keychain' doesn't seem to work. It just keeps asking for these passwords.
What could be the problem?