Well, obviously a lot of people aren't receiving them. Now I have to narrow it down some. First I need to hear from those that are not receiving them - are you on dial up or a high speed connection? What browser are you using? Do you let the page load completely when you first come to the site?
Here's the problems with the PM notification popup - and there's nothing I can really do about this. Because that's java based it is the VERY last thing to run on the page. So let's say you come to the site on the forum list page. Maybe the ad is taking some time to load and you click on a forum. You've now missed your pm notification because the page didn't finish loading. Also it will only notify you on the first page that you go to after you've gotten a PM. So if you miss it on that first page you won't get it on a second page. Another thing that will happen with the multiple PM notifications is lets say you go to the first forum page and get your pm notification, you then read the pm, go back to the first window and click on a forum, read some threads, yada, yada. Then you click on the back button to take you to the forum list - you will get the notification again. That's because when you hit the back button your machine loads that page from the cache in your computer - of which the notification is a part of.
I'm on a high speed connection and as such the page loads very fast. I always get my PM notifications in the pop. I have missed it a couple of times though when I was at a client on a dial up connection and was impatient in waiting for the page to load.
Help fill me in on some of the details and we'll see if there's any commonality here that I can look into.