In my installation whenever I switch 'on' highlight it just sets the column background white. I verified that "yellow" is defined in the showcat.php file, yet it just shows up white. Even when I replace the non-highlight variable with "yellow" it, too, shows up, well, white.
Any suggestions where I can check this trigger? I can't make the connection between the PHP definition of pp_highlite and where it renders that code in the final. And I'd like it to show up as "highlighted"...not just white...