> Feb 15 15:38:11 ldap slapd[12743]: conn=73 op=0 BIND > dn="uid=username,ou=People,dc=example,dc=com" method=128 > Feb 15 15:38:11 ldap slapd[12743]: conn=73 op=0 RESULT tag=97 err=49 text=
Maybe try this under -d -1 and analyze relevant parts (sometime after the BIND and equal or before the RESULT)? Although I'm not sure how much slapd(8) talks about spasswd internals. You might be better off turning up SASL debugging and tracking the connection (or lack thereof) to saslauthd.
