Only Form Fields with Effects applied either fx or transparency and mode i.e. multiply. What galls me most is, its the time producing testing and delivering projects often completed and paid for are now rendered redundant or useless with no warning. Its almost like all the browsers unilaterally loosing support for CSS3 overnight and without warning. May be not a good example as designers would create css in a way that it degrades for lesser browsers. Not something you have to think of over the years with acrobat

Who’s responsibility is it to put it right who should pay for it…………

It not the loss of features its just amount of work that has been ruined the only hope is that people in the business slowly take up the upgrade

Yes the Export is correct usually all the bookmarks work correctly, it the destinations, or linking to the bookmarks within the buttons that is flakey.

Mostly the buttons end up with links to mydocument.indd when they should have mydocument.indd + Named destination. In Acrobat

In InDesign the buttons are configured correctly Back in Acrobat some of the buttons that work have mydocument.indd + Bookmark1 which is odd as Bookmark 1 was renamed in indesign to Introduction. In acrobat there is no Bookmark labelled Bookmark1 only Introduction yet the button works. How relevant this is to the overall problem i do not know bur it demonstrates some strange inconstancies and that Indesign must be retaining and exporting information that we are not privy to which is not helpful when trying to trouble shoot a problem.