I am on Gnome-Shell and using Ubuntu 11.10. The problem is after a recent update and also after installing a few extensions, when I logged in to Gnome Shell, I can't find the top panel or AWN. Only the wallpaper is showing and then Conky is displaying. It also seems to me that for some reason the display effects are not working and that is why AWN is not showing. Need your help to get back the panel.