If you use a backslash (\) in a Domino Directory form name so the form cascades off an item in the Notes "Create" menu, add the right-most portion of the name as an alias to the form name. This will ensure the object is correctly named in the schema. In addition, use this alias as the formula for the form's Type field.
For example, to cascade the new form "Printer" off of "Acme" in the Create menu, give the form the name:
Acme\Printer | Printer
...and use "Printer" as the formula for the Type field so the LDAP name becomes Printer rather than Acme\Printer. If you use the form name Acme\Printer, you will not see search results if you use "Objectclass=Acme\Printer" in a search filter. Also, if you use another search filter to return entries associated with this object class, the class shown in the results is AcmePrinter (with no backslash).