Since updating my laptop to F10, the notification area applet seems to have the normal things that would be there (network manager applet, pidgin, etc), but the icons themselves are not visible. I can however, left or right click on the places where they would be and they seem to work normally. I have: gnome-panel-2.24.0-4.fc10.i386 ...installed. Let me know if you need me to collect any other info.
*** This bug has been marked as a duplicate of bug 465280 ***