Shoutbox

well, not really, it just preforms an illegal operation. I have found another way it happens:

make one of them display on the top of something, right click the task bar and click show the desktop. The right click msn in the system tray and close. Then open it again, youll find they are still ticked but they dont show on top. (this only happens ocassionally though, keep repeating these steps till it works (it does it on mine 80% of the time))

This exact type of thing happens when msn has an illgal operation and it refreshes the screen after asking if you want to send error report.