Having nothing better to do this weekend, I downloaded and installed ADE 4.0 to do some testing with epub3 documents. It's getting there but not quite ready for prime time. Some of the regular and fixed layout documents came out looking very strange. Sadly

, no content servers available to let me test the new DRM -- I was curious as to whether the stickiness would copy from a virtual machine to a physical machine.
BTW, I still have ADE 2 on the physical machine. ADE 4.0 was installed under Windows 8.1 x64 and OSX Mavericks 10.9.5 running in virtual machines.