I just have to vent after having just spent over an hour trying to find out how to use Javascript with Adobe Acrobat X to reverse and reorder pages. This is the most basic function to have in a program like this (nevermind having to use JavaScript to do it), but what I had to do was to find the proper JavaScript from some forum online, then go to JavaScript under the Tools menu, and when I get there, you can't actually just create it as a macro/action and make it run then and there. :O You have to embed it into some premade action like when the document saves? WHY is there JavaScript support if it's going to be implemented like that? Please tell me I'm missing something here!
The other problem with Adobe Acrobat X, at least on OSX, is that you can't do this manually without having a mental breakdown. Think about how thumbnails are handled in Pages. I would be happy to reverse the pages manually, as it would've taken all of 15-20 minutes, but it takes AGES to reload the page thumbnails every time you scroll (which is very jittery so you never get to the page you want) and every time you move a page, and there is no way of reversing the pages without actually having these thumbnails up.
Adobe could learn a thing or two from people who make decent, optimized PDF readers, especially on mobile devices, where they know how to preload the nearest pages in the background to reduce loading times for pages and make it a better experience, and they know that when a user scrolls, your best bet is to show placeholders (page numbers maybe) or very simple bitmap rendering of a page, and don't try to load the actual content of a page until the user stops there. This is coding 101, but Adobe doesn't seem to care about that.