Hi all,
I was having some trouble when generating a pdf output with pdflatex for a document with various figures (pdf graphic files). Some of them showed in the generated pdf but others didn't. For those not showing, a blank box with the correct figure size was shown instead. After some digging, I found that the problem only happened to the graphic files for which LyX generated a "bb" (bounding box) option for the \includegraphics LaTeX command. That option is generated when you change the bounding box size in the graphics-clipping pane. Some more digging revealed that the problem is that the latest version of pdftex-def file present in texlive-2017 and also in miktex 2.9 just ignores the bb option, leaving a blank box, with no error message. Previous versions of pdftex-def deferred the bb option to the viewport option (with a warning). In that case the graphic file was included correctly. So, this problem occurs only with updated TeX installations. Have anybody else seen this problem?
