PloneLDAP is a great product, but its bundle ships a not so recent version of LDAPUserFolder. LDAPUserFolder and LDAPMultiPlugins download urls are both ending with "/download". That seems to confuse plone.recipe.distros, because it installs just one of them. Furthermore, at plone.org PloneLDAP single product (as opposed to PloneLDAP bundle) download url ends with... a space! (%20).
So we have uploaded theses tarballs on release.ingeniweb.com. Here is a working part for buildout:
recipe = plone.recipe.distros