I got this when upgrading to redhat-config-printer 0.6.13-1 from 0.6.12-1:
error: %post(redhat-config-printer-0.6.13-1) scriptlet failed, exit status 1
I suspect the problem is the "/sbin/service lpd condrestart", which I believe
will exit with status 1 if lprng isn't running.
Fixed in CVS.
0.6.20-1 has this fix.