Does anyone know why certain text in a pdf file would display when viewed
using Acrobat Reader, but be invisible when viewed using Preview?


I had a couple of reports emailed to me, and was querying the date, title,
and column headings of the reports. The sender was telling me the
information was there, but I couldn¹t see it. Eventually, it occurred to me
to try opening the reports using Reader instead of Preview, and so appeared
the missing information. Initially I thought perhaps it had something to do
with page margins, but some of the text that is missing when viewed in
Preview is further away from the margin than text that can be seen using
both applications, so not a margin issue it seems.

Any clues as to why this happens?

Cheers, Steven