> Hi Stefan,
> 
> I attached a 12 page (22kB) pdf file - no images - to an entry, but elog only converted the first 8 pages to
> images (.png).  This is reproducable, i.e. a different small multipage pdf file produced the same number of images.
> 
> The size of the pdf file does not seem to be a problem, a single page pdf file with a lot of images in it
> attached as expected.
> 
> Is this correct, or a defined limitation?

This is a defined limitation. Sometimes people attach whole books in PDF form to an entry, and you don't want to end up 
with hundreds of images cluttering your browser. If you want to see the full document, just load it into your PDF viewer.