When I print something from a wiki using the blueview theme, the page uses very small fonts. I suspect this bit in the CSS may be the problem:

body {font:13px/1.231 "Lucida Grande",Verdana,Lucida,Helvetica,Arial,
sans-serif;*font-size:small;*font:x-small;}

(Split on two lines for readability.)

It's probably not a good idea to set the absolute font size. Will experiment what changing that results in.

--liw