gnome-panel-printers cannot detect usblp printer

The default gnome printer control panel cannot detect usblp printers. After I edited the .desktop for the unity printer control panel so that it would display in gnome I was able to use it to detect the printer.

dmesg and cups error_log attached.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: gnome-control-center 1:3.6.3-0ubuntu24
ProcVersionSignature: Ubuntu 3.8.0-19.30-generic 3.8.8
Uname: Linux 3.8.0-19-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
Date: Fri May 17 23:15:51 2013
InstallationDate: Installed on 2013-04-26 (20 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)
usr_lib_gnome-control-center:
 activity-log-manager-control-center 0.9.4-0ubuntu6.1
 deja-dup 26.0-0ubuntu1
 gnome-control-center-signon 0.1.6bzr13.04.05-0ubuntu1
 gnome-control-center-unity 1.2daily13.04.09-0ubuntu1
 indicator-datetime 12.10.3daily13.03.26-0ubuntu1