I can reproduce the bug on Wheezy. I also managed to narrow down the cause, with the help of "texdoc -d pgfmanual".
The culprit is the way xdg-open is invoked, which is asyncronously. Texdoc runs "xdg-open filename; rm -f filename", and the file is deleted before the pdf viewer gets a hold of it. A work around is to set a pdf viewer in a texdoc configuration file as explained in http://tex.stackexchange.com/q/260/1630 That way bypasses xdg-open, and thus works synchronously. I hope this helps. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
