Notes Page Master problem

I have an anomaly with several of my PowerPoint presentations. I am working
in PowerPoint 2007 in Windows xp.

When I look at the Notes Page, right-click the mouse and click "Reapply
Master", the slide image disappears from the page. I have checked the Notes
Page Master layout and the slide image is visible exactly as I want it, but
it still disappears every time I click "Reapply Master" and I don't know how
to fix this.

I know it is possible to right-click on the Notes Page again and re-check
the box next to "Slide image" but this is fixing the symptoms, not solving
the problem. Also, I would have to do this for every page individually and
several of my presentations are over 150 pages long!

Can anyone help, please?

--
Regards,
Dave