When I create a new invoice, the dialog opens and it appears that focus is on the date in the first entry..  But when I hit "tab" to move to the next column (because the date is fine), nothing happens.  If I click in the date cell then tab works fine.  If I enter a line item the cursor moves to the next line and again tab works fine.  So, it's only an issue when the invoice is first opened.

I think the problem is that the focus starts somewhere ELSE before it moves into the register portion of the dialog.  When I create the new dialog I have to hit tab four times before it actually types in the date cell.  I'll note that no typing is actually entered anywhere I can see before those four tabs are typed.  So, I have no idea which particular widgets are holding focus.