Comment 34 for bug 1001028

apt-cache policy cups
cups:
  Installed: 1.5.3-0ubuntu2~ppa7
  Candidate: 1.5.3-0ubuntu2~ppa7

test 1 - blacklisted, normal mode (not unidirectional)
  prints OK, 8 second delay

test 1a - blacklisted, uni-directional mode
  prints OK, little or no delay between jobs

test 2 - not blacklisted, normal mode
  prints OK, 8 second delay

test 2b - not blacklisted, uni-directional mode
  prints OK, little or no delay between jobs

(each test is 3 print jobs)

syslog and error_log attached