When an error occurs while quering the directory we should add the used search parameters to the error message. This would help to determine if the error is caused by the client or the server.
Reported by ALLENW here: http://www.macupdate.com/info.php/id/24597/apache-directory-studio
minor: Clicking on an such an entry [with an / in DN] throws up an error that says "Error reading entry". Clicking on details shows an LDAP error code 32 - no such object. Rather than show you what LDAP Studio is trying to query, I had to hop onto the server to see what it was looking for. [That's when I discovered the major problem above.]