Yes, I've discovered that PM's don't always get through. Funnily enough, that happened to me just today - after the Cat went back up, so that's not the cause. I was trying to send something to Susan of DT and it took three attempts before it actually made it. I would not have known the first times failed had I not checked my "View Your Sent Messages" list to be sure. (I'm paranoid like that: always have to test doors I have just watched myself lock too. But sometimes it pays off . . .)

Nothing has shown up in my Inbox yet - but it's only been a few minutes!