Dear Maintainer, I have some reason to believe that #878834 is the same problem that destroyed my CPUS printing server, making it print absolutely garbled text from most PDF files.
I filed bug #889302 on package ghostscript. Please refer to the example PDF and screenshot supplied in #889302. In the meantime I found out that ghostscript 9.22 renders the supplied example file fine if I downgrade libfreetype6 from version 2.8.1-2 to 2.6.3-3.2. Also the CUPS printing server appears to be perfectly cured by the downgrade of libfreetype6. Yours, Andreas.