Which of the suggestions listed above did you try? What were the results?

Did you look at the log available in App Mgr? Did it tell you anything revealing?

I think that the best bet is to delete your extras-devel catalog and then type in the info new. That would get rid of any file corruption, which can be invisible to mere humans.

Maybe it would be good if you would show us how each field in the extras-devel catalog is completed.