Hmmm. Seems to be something odd going on.
I long since gave up using PN as my primary e-mail account: since the security breach, it attracts more spam than my Hotmail and Gmail accounts put together - plus it doesn't filter half as well as either of them. So it's all but useless, as far as I'm concerned. I only keep it in case anyone from way back, who doesn't know my new address, might try to contact me there.
So anyway, it would appear I didn't receive any spam at all yesterday or today yet, which is suspicious in itself (although it's often lighter at weekends).
But more importantly, while I was trying to flag and delete the spam from Friday, I got an error message (I may be paraphrasing slightly): "Incorrect username or password. Please go to login page."
Note this was AFTER I was already logged in, and looking at my mail, so how could I possibly have given the wrong login? Does this mean that, in fact, anyone could be looking at my mail, and won't be detected until they start trying to delete any of it?
I have tried without success to reproduce the error, but definitely saw what I saw.
T.