Currently, OpenLDAP 2.1.30-1 is in sarge. Unfortunately, that's a very buggy version. I uploaded 2.1.30-3 about a week ago (I think), with urgency high. It hasn't propagated into testing yet due to missing dependencies (gnutls11 and gcc-3.4 according to update_excuses). Among other bugs, 2.1.30-3 has the following bugs fixed compared to 2.1.30-1: #244827 (grave) and #253633 (grave), plus a couple of merged bugs.
Roland