I am seeing this same problem. The idea to change ~/.gtkrc-2.0 works, but misses the bug. It gives you the option to print to a file or to "LPR". This works if all you care about is your default printer; no other printer can be used. If I specify gtk-print-backends = "file,cups" I get exactly the default result: file shows and allows printing, all the printers show but do not allow printing. So there is a bug somewhere in the CUPS interface, perhaps in the libprintbackend-cups.so library? The .gtkrc-2.0 change merely avoids using CUPS directly; it is just a workaround.
I don't see any response on this bug since it was posted, now 3+ months with lenny in freeze. It would be nice if it got the attention of someone who can investigate and repair, or at least a workaround that uses CUPS. Liam -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]