I got this CORBA error when launching any application from the Gnome desktop. I was unable to run Synaptic and apt-get, and had trouble with just about any app where I needed to use "sudo" to get root privs.
I had just 'cleaned out' the directory /tmp/, and apparently deleted something that wasn't so temporary. The problem started after a reboot after my ill-fated 'cleanup.'
According to the posting at
http://ubuntuforums.org/archive/index.php/t-93314.html
I deleted
~/.gconfd/saved_state
The file ~/.gconfd/saved_state.tmp did not exist.
After rebooting, the CORBA error went away.
I'm running Ubuntu Dapper Drake 6.06 LTS.