Martin Marques wrote:
Could be. It actually can happen when there are concurrent requests and one of them gets a new cookie value. To prevent problems here, the "old" cookie will still be accepted as well in revision 338.
Doesn't this reopen the security problem related to autentication cookie?
Only a little. You can authenticate the session with the current auth cookie or with the last one. This helps, in case that two (almost) concurrent requests are sent to the server but the "old" cookie will not authenticate anymore 5 minutes later. We don't allow all "old" cookies just the last one.
~Thomas