Did some testing in 4.1.1.2:
One slide One master slide Change width of both text boxes is master slide. Back to normal view. > changes not visible.
Create new masters slide also with different width for text boxes Back to normal view. Apply MasterPage2 > changes not visible
However ... the changes do show in the preview of the master slides...
Now add a slide > has MasterPage2 applied Apply first master page > Only one of the text boxes is changed
Now add third slide > both master pages can be applied there and show all changes
The funny thing is, that for the first and second slide the behaviour is still the same, as described above :D
Did some testing in 4.1.1.2:
One slide
One master slide
Change width of both text boxes is master slide.
Back to normal view.
> changes not visible.
Create new masters slide also with different width for text boxes
Back to normal view.
Apply MasterPage2
> changes not visible
However ... the changes do show in the preview of the master slides...
Now add a slide
> has MasterPage2 applied
Apply first master page
> Only one of the text boxes is changed
Now add third slide
> both master pages can be applied there and show all changes
The funny thing is, that for the first and second slide the behaviour is still the same, as described above :D