Comment 9 for bug 66379

Same problem for me in two different machines (ubuntu edgy with default gnome desktop, one of them ppc, the other i386):

Evince/yelp's printing dialog with "Print" button disabled with any printer/queue except "print to file". Other dialogs (as the one from gpdf) functioning correctly.

I use proprietary cups drivers for a Lexmark E340 printer. The problem does not appear with other (less feature rich) cups/foomatic drivers.