Comment 44 for bug 641175

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