Historically there was often a problem editing landscape pdf's created in one version of Acrobat and being updated in a later version: existing link rectangles would be rotated by 90° when the new page (with or without new links) was inserted as a replacement. Adobe's helpful 'solution' was to manually rotate all the links manually (there could be hundreds on an index page!). Fortunately this problem didn't happen when moving from v8 through 10.
BUT.
My Office application was recently revised from 2003 to 2010 and I now find the same problem has recurred. If I ask a colleague with the same version of Acrobat (10.1.6) but Word 2003 to convert the file, the issue doesn't arise, and we both use 'Standard' conversion settings.
If I just use the 'Print to pdf' instead of Convert, the problem doesn't arise: which is fine if I don't need the 'extras' in a Conversion.
Any ideas (apart from pulling more hair out)?