I can apply borders to some cells, but not others.
The cells are of the same type, i.e., numbers, text, etc. There doesn't seem to be any pattern that would indicate a differentiation. (Why you couldn't apply a border to any cell seems a little ridiculous, so I assume that's not the problem.) I should think applying borders to cells would be a pretty basic feature of the application, and any "bugs" worked out long before version '09. Anyway, thanks for any help. (I couldn't find a similar thread in the search, so I do apologize if there is a duplicate I'm unaware of.)
MacBook Pro with Retina display, OS X Mavericks (10.9.1)