I don't need this hint to have "shorter than a session" cookie lifetime!
Due to a safari bug on 10.5.6, cookies are handled so badly that many people consider switching to firefox. It's a real pain in the a**.
I login on a web site, browse another one, come back to the first, and have to login again. Apple support forums are full of people struggling with this issue.

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http://www.patpro.net/

I fail to see how that contributes anything to discussion of this hint. While it is surely very annoying to be faced with such horrendous difficulties as you are experiencing, there are more appropriate places to vent your frustration.

patpro I had the same problem. Fixed it by downloading the Safari installer, deleting Safari.app in Applications, reinstalling Safari then restarting.