[Lilux-help] Debian testing, Mozilla & psnup

Hi, I've got a strange kind of problem on Debian testing with Mozilla and printing (cups). I often want to print somewhat longer documents, but without wasting too much dead trees. Therefore I print into a file, do a psnup -2 to get two pages per sheet of paper, and print the resulting postscript document. When using Mozilla this way, the original postscript document is fine, but the result of the psnup -2 is unusable, as the fonts remain at the original size, i.e. the lower and right parts of the pages get lost - no proper resizing of the page, all in all. I verified this both with gv and gs (which sometimes show slightly different results depending on the postscript document, especially with graphics). This same problem does not appear with postscript documents generated from OpenOffice for instance. Does anyone have an idea on how to go about fixing that particular problem? I'm not overly experienced with printing, so... Greets & TIA, Eric