OS 10.5 - PDF printer description missing since OS update

I recently updated my system software to 10.5.8 and now all of a sudden, in my 'print and fax' preferences, the usual adobe pdf icon I USED to have on the left hand side of the window has disappeared, poof in a puff of smoke.

I've managed to make a new one which now sits in there, but I don't think it's the correct one, because now when I'm in quark and I go choose my print style, it tells me 'the currently selected adobe pdf cannot be used, because it is not a local printer.

Im a bit confused about this, out of my depth, can anyone help? I did manage to make a .ps file with what was available, but when I put it through Distiller, it made a much smaller pdf file than usual so I know something is not right, but I'm not sure if its quark that is having a problem looking for something that is not there, or if its the print and fax prefs side of things!

Would appreciate some guidance pleasy please!
Gabrielle 456 (just watched the last of the Torchwood Series so 456 is in it's honour) ;-)