Last modified: 2012-10-25 12:35:13 UTC
The pages in the scanned PDF file http://commons.wikimedia.org/wiki/File:Houston17RailroadsMeetTheSea.pdf (which originally comes from http://www.archive.org/details/houstonwhereseve00farb) appear to consist of high-resolution b&w (well, black-and-transparent, really) images overlaid on top of lower resolution color images. However, in the thumbnails only the low resolution color layer is shown, so that for example page 9 appears completely blank, even though it actually contains a substantial amount of text.
The black-and-white version of the same PDF (http://commons.wikimedia.org/wiki/File:Houstonwhereseve00farb_bw.pdf) also breaks, but in a different way: no thumbnails are shown for some pages at all, and viewing the thumbnail URL directly shows the following message: Error creating thumbnail: GPL Ghostscript 8.61: Unrecoverable error, exit code 1 convert: no decode delegate for this image format `/tmp/magick-XXPAcJW7'. convert: missing an image filename `/mnt/thumbs/wikipedia/commons/thumb/5/56/Houstonwhereseve00farb_bw.pdf/page1-794px-Houstonwhereseve00farb_bw.pdf.jpg'.
this is referenced by RT #1175 which is now closed. this can probably be closed, but needs verification.
Only looks partially fixed by the GS upgrade to 8.71 (bug 26388). Looks like it'll likely get solved with an upgrade to GS 9.05 (bug 36580).
(In reply to comment #3) > Only looks partially fixed by the GS upgrade to 8.71 (bug 26388). Looks like > it'll likely get solved with an upgrade to GS 9.05 (bug 36580). No. <https://upload.wikimedia.org/wikipedia/commons/thumb/9/9b/PL_Gallus_Anonymus_-_Kronika_Marcina_Galla.pdf/page1-81px-PL_Gallus_Anonymus_-_Kronika_Marcina_Galla.pdf.jpg> Error generating thumbnail Error creating thumbnail: GPL Ghostscript 9.05: Unrecoverable error, exit code 1 convert: no decode delegate for this image format `/tmp/magick-18ivK2AC' @ error/constitute.c/ReadImage/532. convert: missing an image filename `/tmp/transform_5a720eb26b35-1.jpg' @ error/convert.c/ConvertImageCommand/3011. The PDF has an absurd resolution but works fine in okular.
