password hashes and simple binds

Hi, I have a ldap server (2.4.36) with various password hashes {CLEARTEXT} {KERBEROS} {SSHA} for different users, there is no pasword-hash declaration in slapd.conf. Now i face a strange behaviour with {CLEARTEXT} hash. that is: userPassword: {CLEARTEXT} secret A sasl bind with DIGEST-MD5 is succesful, but a simple bind returns error 49. If I remove the {CLEARTEXT} hint and only the secret remains, userPassword: secret all binds (sasl and simple) are successful. Any hints why this is happen?

-Dieter