kdeprint dialog does not download remote ppd-files

Hello

I'm not sure, if the bug belongs to the qt dialog or to the kdeprint
dialog. That's the reason I ask on the mailing list.
The problem appears, when the printer is not installed to the local
cups-server. For printer there is the following DeviceURI in the
printers.conf:
DeviceURI ipp://cups.server.ch/printers/PRINTERNAME

In this case the kdeprint dialog does not download the ppd-file of the
printer PRINTERNAME from the cups server. This means you can't access
all advanced options.

A work around is the download the ppd-file and put it into the
/etc/cups/ppd/* directory. As soon the printer or its configuration
changes you have to redownload the ppd file. This work around does not
work with unexperienced user.

I'm sure, that the problem is not in the local cups installation,
because the the print dialog from gtk (which uses evince) downloads each
time the right ppd file an you can access all advanced options without
the workaround.

It seems, that die wizard for adding printers in kde4 have the same problem.

Best wishes,
Cyril