I just upgraded from Nvidia-curent to the 304 experimental so that I could install Steam. The 304 package is working just as well as the current driver on my setup except that when I log in I get two instances of gnome-panel on my primary monitor!
Its really odd as my settings are the same as they where in the current driver. (TwinView, absolute positioning on main monitor, 2nd is left of it) and I saved the xorg.conf over the old one instead of appending to it.
Any way to only get one instance of gnome-panel?