I know I have customers who have directories filled with uids with backslashes (\) embedded in them (from an NT domain name heritage).
Apache 2.0.47 over-escapes these whereas Apache 1.3.x with auth_ldap 1.6.0 is fine (auth_ldap 1.4.7 had issues, though). I need Apache 2 to work (as Apache 1.3.x has other issues on Windows...)
-- Jess Holle