Gnome 3 failed to start during live installation from LiveDVD

view story

http://forums.fedoraforum.org – Dear All, I burned fedora 18 live dvd i386 and am trying to install Fedora 18.While my dvd starts reading the dvd it takes a long time and after all the filesystems are mounted it gives me an error "Gnome 3 failed to start". After that I am presented with 2 options, try fedora or install. I hit install and see what?...It does not allow me to partition.In fact it selects auto-partitioning option on its own. Also I can see an alert bulb(it looks really small) just on top right hand corner for the Auto partitioning option.When I right-clicked on it showed me my HDD(to be us (HowTos)