This is in reference to the search application that is run when you click the "Search Active Directory" link in My Network Places. Searching a Samba 4 AD yields 0 results, always.
Running Ethereal while attempting a search for a user shows that the search uses the following filter in the LDAP query:
Of note: objectCategory is, of course, syntactically a DN. Apparently AD allows the query filter to be a string containing just the CN of the object category, which Samba 4 doesn't yet do.
We now support this query format.
Can you retest with current SVN?