Here's what I found:
Having reset the router (with v1.1 installed), from http://dlinkap1fe2.local (leaving the password field blank), when you select Login, the UI takes you to http://dlinkap/index.htm and fails, when it should be taking you to http://dlinkap1fe2.local/index.htm which when entered manually properly takes you to the new UI.
From the UI Index screen, this same issue affects all other UI screens, ie, Network, htm, Extwireless.htm, etc (noting that all other UI screens appear to be Case sensative requiring an upper-case for the 1'st character).
What's funny is that the default name is dlinkap
Anyway, I rolled-back to v1.0 and all is ok again.