Gnome Desktop Wildness In 10.4

[Graham Watkins]

I opened gconf-editor to make my trash icon visible and I think I must 
have clicked on something by mistake because a semmingly infinite number 
of instances of file manager began to open on the panel and all my 
desktop icons vanished.   I cannot create new ones any more by dragging 
and dropping from the menu. Also the right click options on the desktop 
have disappeared.

What have I done wrong and how can I put it right?