the line:

ldap_mod_del($this->cid, $dn, $attrs);

where $attrs holds:

Array ( [street] => Array ( [0] => test ) )

and currently in openldap (2.0.23) the attributes are:

Array ( [street] => Array ( [0] => test [1] => test1 [2] => test2 ) )

causes apache (1.3.26) to segfault thus:

[Tue Aug 27 01:05:41 2002] [notice] child pid 6589 exit signal Segmentation fault (11)
[Tue Aug 27 01:05:42 2002] [notice] child pid 6590 exit signal Segmentation fault (11)
etc ...

from what i can gather, an attempt to ldap_mod_del an attribute [0] whilst [1] still holds a value causes the segfault. because calling ldap_mod_del to delete all three attributes works fine.