Logging in

We've had a bit of a weird experience tonight.

I have Dogsey, FB and some others set to remember me. I click on the bookmark, and I am logged in.

All was well this morning. Tonight, both FB and Dogsey seemed to not know me. I thought I had somehow wiped the passwords off, but the first letter of my username in each case brought up the right user name, and I'm in.

My oh has his own computer, and his has also done the same with his sites. Totally different computers, only thing in common is Windows XP and Panda AV.

All is well now, but I am a bit curious why? MS? Panda? A strange coincidence?

Luthien, I have to log in to Dogsey every morning even though I have ticked the Remember Me box and never log out. I do not even switch my computer off at night, just set it on Hibernate.

I also have to log in again if I check an incoming email on my Dogseymail account.

Dogsey is the only forum on which I have to keep logging in.

My OP is Windows 7 Ultimate, browser Firefox 5. [I would up it to FF6 but Stylish is not compatible with FF6].

It's just strange I never have had to before?

I also have Firefox.