By default the PrevNext plugin displays navigation
buttons. However, the default theme only includes
button images for the 'Previous' and 'Next' buttons.
If you use the other navigation buttons, you just see
text strings. The other items are Up, Contents, Index,
Last, and First.
I created the missing buttons to match the look of the
existing two buttons. I also created new images for
the two existing buttons to make them exactly match the
buttons I created, and because the originals were gifs.
All the new buttons I created are hopefully attached
to this message. Please add them to the default
phpwiki in themes/default/buttons/en.