I held off updating from MDT 2010 to 2012 Update 1 for as long as possible, not wanting to break something that was working. Turns out that's exactly what happened
First, the basics. No problems actually upgrading the deployment share. I did make a copy of the share as a backup before upgrading it, so that's still available to me if it becomes necessary. After the upgrade, I did initially have troubles
with the boot images not correctly running the wizard, but I soon discovered that the boot images generated by 2010 wouldn't work with the the deployment share once upgraded to 2012. I simply needed to generate new boot images under 2012 Update 1 to replace
the boot images created by 2010, and that problem was also solved.
The problem I now have is this: since upgrading, I can no longer add applications under the Dependencies tab of any application or application bundle. I've successfully created a new application with source files since the upgrade, so that's still working. But when I attempt to add any application to the Dependencies tab of any application or application bundle, it simply never appears in the list of applications. No error message is displayed and everything appears to be in order otherwise; when I click the "Add" button on the Dependencies tab of an application, the "Select an item" window appears just as it should, and lets me select an application from the list. But when I click OK, the window is dismissed, and the application never appears in the list.
I've uninstalled and re-installed all the WAIK and MDT components, and then went so far as to install the components on another server, just in case my machine was somehow messed up. Still no change - behaves exactly the same when administered from the Deployment Workbench of either machine. (And no, I don't have MDT open on both machines open at the same time).
My first thought is that there's some kind of permissions problem, but I'm not sure a) which folder on the deployment share houses the application bundles, or b) what the permissions should look like. I've discovered I can remove applications from the dependency tab, but I can't add them. It makes no difference whether I try to edit an existing one or create a new one.
Google has turned up exactly zero hits on this particular problem. I certainly don't want to nuke my deployment share and start over. Any ideas?
Thanks in advance for all assistance.