As far as I remember, the "Implement Interface member" operation used to be just one dialog. Now when I run it I get two forms.
The first is what I remember, "Select Members to Implement" and it shows a tree of interfaces and members and initially has a grayed out Finish button.
What's new is when I select something the Finish button changes to Continue and I get a second page that says "Select Members to Implement with Abstract Implementations". I don't remember ever seeing this form before and don't really understand it. The property editor for "Copy XML-doc" is much more cumbersome than the old checkboxes and I don't see why we'd ever want to specify Target file. And the premise of "Abstract Implementations" doesn't seem to make sense anyways since the target class is not abstract.
I hope this was just a temporary mistake and is not planned as a permanent change to this operation--I liked the old way and used it a lot.
I have build 765 installed now.