[Bug 36106] Non-text files reported as "plain text document"

[Marcel Stimberg]

Public bug report changed:
https://launchpad.net/malone/bugs/36106

Comment:
I can reproduce this problem for some PDF files (files are recognized as "text/plain" but can be opened with evince/xpdf/acroread). I'm not sure whether this plays a role or not but all PDF documents that are not recognized by nautilus (no problem using the file command) are PDF 1.4 documents. However, there are PDF 1.4 documents that are correctly recognized.
My gnome is up-to-date:
libgnome2-vfs 2.14.0-0ubuntu1
nautilus 2.14.0-0ubuntu3

Unfortunately I don't have a small file to attach, but the pdf manual
from the pgf package is an example of a not correctly recognized file.
After installing pgf it can be found at

/usr/share/doc/texmf/latex/pgf/version-for-pdftex/en/pgfmanual.pdf.gz

"gunzipping" gives a pdf file recognized as "text/plain".