Single Password and AD Integration plugin conflict

I recognize that this is a "beyond the call of duty" request, given the difficulty in triaging issues with plugins that are not your own, but I'm having an issue with the new ability to set a Single Password on a blog. I'm continually told the password is incorrect. I'm assuming this has something to do with the the AD plugin going "somewhere else" when looking to authenticate.

I'm not sure if this is something you can help with, but I thought I would take a shot, given how helpful you've been in the past.