User had a problem today with FB 'forgetting' her machine when she logged in each day. Needless to say this same issue also affected her Citrix environment for hosted applications (something work related:-).
A random search turned up this:
And she got a helpful pop up from FB itself "seeing this message often?"
In IE, "delete browsing history on exit" was checked. It is not clear to me that
that means cookies (darned confusing MS nomenclature again...) But sure enough
uncheck it and the cookies persist.
And away we go, into the sunset!