Starting with gnuplot version 4.1, as far as I can tell, EPS pictures which have been exported from gnuplot contain a section which tries to set the document info: SDict begin [ /Title (test.eps) /Subject (gnuplot plot) /Creator (gnuplot 4.1 patchlevel 0) /Author (Adrian Vogel) % /Producer (gnuplot) % /Keywords () /CreationDate (Tue Aug 13 10:15:23 2007) /DOCINFO pdfmark end As a result, LaTeX documents which contain gnuplot plots will have the document info which was included in the last plot, and not the one which was originally set by the hyperref package. A solution which I could find was to strip the corresponding sections out of the PostScript file with something like: dvips ... | sed '/^SDict begin \[$/,/^end$/d' | ps2pdf ... Of course this is not perfectly safe because you can neither be sure that the guplot code will always look exactly like this (maybe in future versions of gnuplot), nor that this will not remove pieces which you'd like to keep (maybe in future versions of hyperref). However, it works for now. Another thing which is loosely related to that: Obviously my version of ps2pdf can understand "\CreationDate" data which has the plain Unix "date" format and does not need the D:YYYYMMDDhhmmss+TZ'tz' format anymore. FYI, I have TeX (Web2C 7.4.5) 3.14159, hyperref v6.73n, dvips(k) 5.92b, and Ghostscript (and ps2pdf) version 7.07. All this runs under Scientific Linux 4.4, which is basically a flavour of Red Hat Enterprise Linux 4.