Our site, which has a few hundred thousand users log in each day, is experiencing a very rare problem where certain IE8 users abruptly lose all their cookies, and therefore are then logged out. Typically a session for them goes like this:
- they log in
- they browse anywhere from 1-10 pages
- their cookies disappear and they're logged out
- possibly repeat this process
- eventually confused, they send us a feedback message describing their troubles.
I noticed this question:
about IE8 cookie loss, although the original poster just had a bad date/time on their machine. (This is not the case with our users.) Interestingly, though, a few of the comments on that thread described the problem a few of our users are having.
Has anyone else heard of this or have a solution?
Some other notes:
this only happens to IE8 users, and (possibly a false alarm?) every once in a great while an IE7 user. Those who get the problem are a small minority of IE8 users, but they get it repeatedly, over many days. So it seems to apply only to certain machines.
there is no reliable user-agent pattern to this that we can find.
it seems to be independent of OS version
many users claim not to have any kind of internet security packages installed (although it's feasible they're confused about this)
Seriously - I appreciate any ideas out there! This mystery has been bugging us for months.