There is a glitch in the PM system that makes it so you never recieve a pop-up notification message. It's rather annoying, I've gone for days with a new PM in my box without notice.

Can't you change these settings in your CP? I think you have a choice of Popup or Email notifications. If it is a glitch in the system, I can only report it to Strider. The email notification works good for me.

Yes. But even with the pop-up message checked, nothing happens. Hence why I made this thread.

I've contacted Strider and he'll look into reporting it to invision.