I've got a similar problem also.
libreoffice 3.5.4 kubuntu 12.04 i386.
My libreoffice loses cups connection after around 5 min. All printers are shown, but doesn't print including cups-pdf printer.
I supposed the printers are shown through /home/<user>/.cups/client.conf with 'ServerName <someprintserver>'
Since we're using cups on regular basis we are hoping for a solution.
I've got a similar problem also.
libreoffice 3.5.4 kubuntu 12.04 i386.
My libreoffice loses cups connection after around 5 min. All printers are shown, but doesn't print including cups-pdf printer.
I supposed the printers are shown through /home/< user>/. cups/client. conf with 'ServerName <someprintserver>'
Since we're using cups on regular basis we are hoping for a solution.