I've had a script using Net::LDAP running against OpenLDAP since late September with no issues to date (*knocks on wooden head for luck*). I had more an issue with the learning curve for dealing with LDAP than with the module, since I was learning LDAP as I went from the docs for Net::LDAP and the section on LDAP from O'Reilly's Perl for System Administration (with a question or two in here as well, if memory serves).

I'll leave this with a piece of advice that may prove helpful: use callback routines if you do searches, especially if you do ones that could potentially return a large amount of data. I uhhh... (*looks down sadly*) kind of ran a machine out of both physical memory and swap more than once before I found out about that because of a query that returned several hundred thousand records (*sheepish grimace*).

I wish you the best of luck with the process, and hope you might consider letting us know how it goes (if you have the opportunity).