Since I upgraded to the latest version 2.0.67532 of ADE, the navigation is broken for all EPUB files being displayed. The pages do not turn, scrolling with the mouse or the scrollbar does not turn pages, hyperlinks remain dead in both the NCX and the internal TOC.
Is it a known bug or something specific to my system (Windows 8 64 bit)?
I haven't hear of that bug, though ADE2.0 does tend to be slower in navigation.
There are lots of bugs in ADE2.0. Try replacing ADE2.0 with the older but more reliable v1.7.2.
Version 1.7.2, it is a little difficult to find, available on Adobe site for Windows and for Mac.
The forum software is sometimes corrupting the link above. There shouldn't be a blank in 'editio ns.html'. The following redirects to the same page: http://tinyurl.com/diged172