Still doesn't work for us.
We're only seeing this since the 11.0.8 patch, but that might just be a coincidence, as we tried our existing package of 11.0.7 and it's not validating either.
This only seems to be affecting new installs, not patched installs.
This appears to be a change that has happened on the Adobe side. We're not going to be distributing our Serial Number for end-users to re-enter. Adobe needs to provide a better fix for sysadmins to deploy silently.