I realize that this is a bit late, but I finally got around to testing ghostscript 8.71.dfsg.1-0ubuntu5.3 in -proposed and it fixes both my original problem and the reduced test case I submitted with this bug report.
I realize that this is a bit late, but I finally got around to testing ghostscript 8.71.dfsg. 1-0ubuntu5. 3 in -proposed and it fixes both my original problem and the reduced test case I submitted with this bug report.