Bug#849951: cups-filters: Printing fails sometimes with ERROR: typecheck OFFENDING COMMAND: know

[Till Kamppeter]

This looks like some bug-in-the-PostScript-interpreter-of-the-printer 
issue. Please follow the instructions of the section

PostScript (PDF) printer chokes on the PostScript (PDF) coming from Ubuntu
on

https://wiki.ubuntu.com/DebuggingPrintingProblems

Note that the printing parts of Debian and Ubuntu are nearly equal, so 
the instructions should work on Debian, too.

   Till