I"m having the same problem using VC 9.9.8. Interesting, when I deselect the notifications in the VC client tray on my laptop running just the VC client, the pop-ups keep occurring. When I deselect the notifications in the VC client tray on the Server running VC Server, the pop-ups stop! Why does it work on the VC client that's running on the VC Server an not work on the VC client loaded on my laptop?
Todd