I'm only posting this under the Koush as I'm currently running CM6-RC1 now. I haven't used the Corporate Directory app since I rooted my phone a little over a month ago until today. Now, I get an error that says:

Application Not Supported:
This application depends on software that is only available on DROID by Motorola. Please go to the Manage application setting and uninstall this application.

Has anyone else come across this? I realize that not everyone would be using this since you need an Exchange account for this to work to begin with. Any ideas if it's doing this because I'm rooted? Obviously this is not an app that you use all the time, but a very valuable app to have when you need it and need to access people within your organization but not in your contact list.