error session in IPAD2

[eluser]kreamik[/eluser]
this error happen in this way .. since i only borrow my friend's ipad so i can't test it anymore for a while ..

after insert data to session especiall login user id then i have problem,
i see IPAD2 has 2 cookies save to DB (i am sure it work similar with session with no db).

so it save to cookies known as macintosh and read cookies from ipad2 (macintos and ipad2 is cookies from ipad2).

So i could not login since comparing data always to be false ..

by now my solution is using native session by PHP.

Is this a bug?