Upgrade Issue FC5 to FC6

[Jim Duda <jim duda tzo com>]

I recently upgraded to FC6 from FC5 via yum.  All appeared fine for a 
few days.  Today, my desktop was hosed.  I finally figured out that I 
was missing the nautilus program.  According to yum, nautilus was 
installed, however, the binary was missing from /usr/bin (maybe I 
deleted it accidentally somehow).

Is there anyway to have yum scan all the rpms to make sure what should 
be installed is actually installed?

Thanks,

Jim