I don't recall when this began and what I may have done, but using Acrobat Pro 8 at work and documents always open without default (navigation, etc.) toolbars. I have to routinely press F8 to view them.
Have tried setting edit -> preferences but it doesn't seem to apply to new documents received from others. Is there an answer to make the toolbars always appear?
In Acrobat's Preferences, for the Documents category, in the
Open Settings pane deselect "Allow documents to hide the menu bar, toolbars, and window controls".
For the Navigation tab, I don't see anything in the preferences that would let Acrobat disregard the Navigation tab setting selected in the Initial View tab of the authored PDF's Document Properties.
Be well...