This entry
[ 103.167248] type=1400 audit(1385021818.631:48): apparmor="DENIED" 
operation="setrlimit" parent=2289 profile="/usr/sbin/cupsd" pid=2294 
comm="cupsd" rlimit=nofile value=4096

is interesting, and may be part of the problem. Can you please attach the 
output of
apparmor_parser -p /etc/apparmor.d/usr.sbin.cupsd

also you can try testing with the cups profile disabled, to temporarily disable 
it you can do
  sudo apparmor_parser -R /etc/apparmor.d/usr.sbin.cupsd
or to permanently disable
  sudo aa-disable /etc/apparmor.d/usr.sbin.cupsd
  sudo /etc/init.d/apparmor restart

after which you should restart cupsd
  sudo restart cups

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https://bugs.launchpad.net/bugs/1251973

Title:
  Printing denied since upgrade

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