You posted on the partner forum too, so just in case here's my reply:
The only thing I can think of is your VBA dlls got corrupted when you installed Adobe Acrobat 11. As such you probably need to reinstall these, as follow:
VBA Runtime 6.0 - support.microsoft.com/.../290887
VBA Runtime 6.5 - www.microsoft.com/.../details.aspx
You can always run the msi from the VBA folder on the GP media.