Guys, thanks for the tips, but they still don't seem right. Maybe it's me, but the issue seems like a bug in AwareIM to me.
If you open a form via a View operation, the Save option is not there. However, open the same form via an Edit operation, and the Save option is there. Perfect behaviour, so the form knows whether it was opened by a View or Edit operation.
Given that, why then isn't that same approach carried through to the tabs on the same form. If AwareIM knows that the form was opened by a View operation, why not hide the Edit option on the tabs (or at least be able to configure that behaviour)? It hides the Add New option on the tab, so it must be possible.
I accept that, through having multiple forms etc, I can do what I want. I just think that I should be able to achieve what I want through default configuration.