Prevent default button behavior of "Add new record"

If a page has no other controls except a grid with the add new record command, whenever a user presses enter they get the insert behavior - even if they're in the middle of editing a record. It's confusing and annoying if you have a grid configured for modal, popup edits - and you press enter while editing. RadGrid launches a 2nd insert popup on top of the edit popup.

How can I prevent the add new button from behaving like a default button?

Thanks!