It may be this bug:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=580963
I can test next week whether the workaround mentioned there ("Removing the -dUseCIEColor option from /usr/lib/cups/filter/pstopdf") works for me.
A similar bug was also reported in CUPS, but it was closed since pstopdf is part of ghostscript:
http://www.cups.org/str.php?L3580
However my testing indicates that on Ubuntu the version of ghostscript doesn't change anything.
It may be this bug:
http:// bugs.debian. org/cgi- bin/bugreport. cgi?bug= 580963
I can test next week whether the workaround mentioned there ("Removing the -dUseCIEColor option from /usr/lib/ cups/filter/ pstopdf" ) works for me.
A similar bug was also reported in CUPS, but it was closed since pstopdf is part of ghostscript:
http:// www.cups. org/str. php?L3580
However my testing indicates that on Ubuntu the version of ghostscript doesn't change anything.