I upgrade ubuntu 13.10 from the development branch (alpha version or beta version) and after that at login user only two options are available. here I am attaching an image of gnome metacity
- Gnome Compiz flashback
- Gnome Metacity flashback
What are these versions of Gnome and I would like to know what is the difference?
for how to get back ubuntu default I asked here another question and here is a link for that same question