I couldn't print anymore.
Reason: Links in /etc/init.d/rc5.d (and rc3.d / rc2.d) to ../cups are gone. How? Why? Anybody ever having similar problems?
Yast & chkconfig don't create new ones as I would have expected. The rc
x.d directories are owned by root:root with 755 permissions. "Modprobe" says that the cups module is loaded. What can have happened at all?
In desperation I created the links as root by hand. Everything seems back to normal. But...