Created attachment 10207 [details] illustration of problem, this isn't the problem PDF Please see example file. Repro: gsc -sDEVICE=tiffsep -sOutputFile=./test -r300 -f 30020034701.pdf Observe Blue colorant and RGB composite shows solid where it should be gradient on the bottom section.
Created attachment 10208 [details] problem PDF
GPL Ghostscript GIT PRERELEASE 9.08 (2013-01-29)
51 Mb file, its going to be quite a while before I get to that. I'm also unconvinced that this is a PDF interpreter problem as opposed to say a rendering or colour problem.
FWIW the 32-bit Windows 9.10 renders this just fine for me. I may try Linux tomorrow.
Current code seems fine on Linux x64, too.
Can't reproduce in HEAD, closing.