cups: /usr/lib/cups/filter has insecure permissions

Installed to printers without error. But it failed to print with error in /var/log/cups/error_log:

E [11/Oct/2013:07:43:44 +1100] FujiXerox-DocuPrint-C3300DX: Directory "/usr/lib/cups/filter" has insecure permissions (042775/uid=0/gid=0).
E [11/Oct/2013:07:43:44 +1100] FujiXerox-DocuPrint-C3300DX: Directory "/usr/lib/cups/filter" has insecure permissions (042775/uid=0/gid=0).
E [11/Oct/2013:07:43:44 +1100] FujiXerox-DocuPrint-C3300DX: Directory "/usr/lib/cups/filter" has insecure permissions (042775/uid=0/gid=0).
E [11/Oct/2013:07:43:44 +1100] TOSHIBA-eStudio-4540C: Directory "/usr/lib/cups/filter" has insecure permissions (042775/uid=0/gid=0).
E [11/Oct/2013:07:43:44 +1100] TOSHIBA-eStudio-4540C: Directory "/usr/lib/cups/filter" has insecure permissions (042775/uid=0/gid=0).
E [11/Oct/2013:14:25:19 +1100] FujiXerox-DocuPrint-C3300DX: Directory "/usr/lib/cups/filter" has insecure permissions (042775/uid=0/gid=0).
E [11/Oct/2013:14:25:19 +1100] [Job 3] Unable to start filter "pdftopdffx" - Success.
E [11/Oct/2013:14:25:19 +1100] [Job 3] Stopping job because the scheduler could not execute a filter.
E [11/Oct/2013:14:28:28 +1100] TOSHIBA-eStudio-4540C: Directory "/usr/lib/cups/filter" has insecure permissions (042775/uid=0/gid=0).
E [11/Oct/2013:14:28:28 +1100] [Job 4] Unable to start filter "pdftopdf" - Success.
E [11/Oct/2013:14:28:28 +1100] [Job 4] Stopping job because the scheduler could not execute a filter.
E [11/Oct/2013:14:30:20 +1100] [Job 3] Stopping unresponsive job.
E [11/Oct/2013:14:33:29 +1100] [Job 4] Stopping unresponsive job.

The solution is simle, run the following command as root:

sudo chmod 2755 /usr/lib/cups/filter