Comment # 1 on bug 1213477 from Johannes Meixner

First and foremost:
SUSE or openSUSE never developed Gutenprint
(or any other basic printing software).
We provide printing software "as is" from upstream.

As far as I know this is unavoidable for
a Gutenprint major version upgrade
because /usr/sbin/cups-genppdupdate
(which is run as RPM post install script)
cannot properly regenerate Gutenprint PPD files
for existing print queues
(i.e. what there is in /etc/cups/ppd/*.ppd)
for a Gutenprint major version upgrade.

So for a Gutenprint major version upgrade
you have to manually re-create the print queues
which use Gutenprint as printer driver.

When Gutenprint 5.2 PPD files have (long line shown wrapped)
-------------------------------------------------------------
*cupsFilter:
 "application/vnd.cups-raster 100 rastertogutenprint.5.2"
-------------------------------------------------------------
versus Gutenprint 5.3 PPD files that have
-------------------------------------------------------------
*cupsFilter:
 "application/vnd.cups-raster 100 rastertogutenprint.5.3"
-------------------------------------------------------------
this is very likely intentional by Gutenprint upstream
because in general the contents of PPD files must match
the specific printer driver software where they belong to.