I discovered the problem. I have the following in my ~/.emacs:
(custom-set-faces '(mode-line ((t (:background "black" :foreground
"white" :box (:line-width 1 :color "white")))))). If I remove the
:box (:line-width 1 :color "white") part, the pager works fine.
Is there something wrong with that line?
Thanks,
Joseph