Gnome 3 not showing anything :(

[Antonio Olivares]

Dear folks,

I have happily run Gnome 3 on several machines three x86_64 ones, and on one 64 bit machine I installed i686 version and it was running great till today.  Only gkrellm shows up when starting.  How can I get it back?

Should I create a new user?
Is there a settings directory i.e, 
$ rm ~/.gnome3/????
to restore it back.

I applied all the updates as of yesterday & today and something broke it :(
on this machine.  The others are fine.  

Thanks in Advance,

Antonio