Okay.
Go to View|Master|Slide Master
Then go to View|Color/Grayscale|Grayscale
Right-click the title placeholder and choose Black and White Settings, and
in there, choose an appropriate option. "Automatic" will probably do it
here.
Repeat for any other problem placeholders. Also repeat on the Title Slide
Master if necessary.
Then do the same with View|Color/Grayscale|Pure Black and White. That way,
it will work no matter if you choose Grayscale or Pure Black and White in
the File|Print dialog box.
You can also do this on the placeholders on the slides themselves, but I
think it will be easier and faster to make the change on the master slides.