I use Acrobat extensively, and have a recurring problem that is driving me nuts.

Often, if I close a file or take some action that throws up a dialog box, the dialog box will be placed behind another active window and I can't get to it. As a result, I can't take action on the dialog box and the program is effectively locked.

Example: I have six PDF tabs open. I closed a file. It threw off a dialog box, which I can't see, but which presumably asked me if I want to save changes. But that box is behind another active window so I can't see it or take action, and thus I have no option but to force quit Acrobat and lose my saved work.