Comment 5 for bug 457574

After further testing, it looks like a strange or subtly corrupted PDF file. Karmic's ghostscript has trouble with it, too:

$ pdf2ps AN-1515.pdf
Error: /rangecheck in --run--
Operand stack:
   --dict:9/18(L)-- --dict:13/15(ro)(L)-- 105 i -string-
Execution stack:
   %interp_exit .runexec2 --nostringval-- --nostringval-- --nostringval-- 2 %stopped_push --nostringval-- --nostringval-- --nostringval-- false 1 %stopped_push 1862 1 3 %oparray_pop 1861 1 3 %oparray_pop 1845 1 3 %oparray_pop --nostringval-- --nostringval-- 2 1 12 --nostringval-- %for_pos_int_continue --nostringval-- --nostringval-- --nostringval-- --nostringval-- %array_continue --nostringval-- false 1 %stopped_push --nostringval-- %loop_continue --nostringval-- %finish_show --nostringval-- --nostringval-- 12 11 1 --nostringval-- (gs_show_enum) %op_show_continue
Dictionary stack:
   --dict:1152/1684(ro)(G)-- --dict:1/20(G)-- --dict:75/200(L)-- --dict:75/200(L)-- --dict:106/127(ro)(G)-- --dict:285/300(ro)(G)-- --dict:23/25(L)-- --dict:4/6(L)-- --dict:22/40(L)-- --dict:1/1(ro)(G)-- --dict:10/15(L)--
Current allocation mode is local
GPL Ghostscript 8.70: Unrecoverable error, exit code 1

Converting it to postscript with poppler's pdftops produces a PS file which ghostscript cannot convert back to PDF.