I'm a member of several SE sites and not a member of others. During the course of the day, I find myself having to log in several times, while other times it automatically logs me in. When am I logged in and when am I not?
http://stackoverflow.com/network-login-help tells me I'm fine. In fact, when I went there, it logged me in. However, the first stop this morning was to log in at stackexchange.com and then click through to a few questions I'd asked on Personal Finance and Money, at which point I was logged out...? This despite getting there from the "Inbox" on the top-left dropdown, which only appears when I'm logged in. I had to login with my Google account again.
using IE8 with InPrivate Browsing, could that be interfering?
ETA: Today's path:
www.stackexchange.com. Logged in via Google.
Via inbox, went to money.stackexchange.com. Had to log in again via Google.
Went to stackoverflow.com to use the network login tool. Was auto-logged in.
Browsed programmers.stackexchange.com, where I have no login. Was not logged in (correctly).
Went to english.stackexchange.com, where I have a login. Had to log in again via Google.
Not once did I see the behavior whereby I click "login" and it auto-logs me in. I haven't visited any sites before this path today, and it wipes my history and cookies when I close IE so it's not holding over from yesterday.