Domain Scan Failing - Unknown Username

I'm unable to perform a "Windows Domain Scan" since upgrading from Build 9033 to Build 9035.  If I attempt to do this manually (Admin -> Windows Domain Scan (in "Discovery") -> Scan Windows Domain) I get a "Unknown username or wrong password given to enumerate the Workstations in the Domain." message on the screen.  I also receive the same message if I click the "Fetch OUs from Active Directory again." link.

I know the account being used is valid, not disabled, not expired, and that the correct password is being used (I have tried using several accounts, all members of the "Domain Admins" group, and all have the same result).  There has been no change to any Group Policy Object, firewall settings, etc.  The only change was the SDP upgrade.

Has anyone else seen this, and more importantly, does anyone have a solution?

Thanks.