Same here. I've created a group called "admins" in LDAP and I'm getting successful auth, but no group matching.
Edit:
I've tried creating a new group called "RouterAdmins" in both LDAP and PF.
Additionally I've told PF to look in the the groups portion of the tree to find the CN's for groups.
Hack that worked but I don't like it.
I added an attribute to a user I'm testing with, and made it ou… cn=RouterAdmins,blahblah. PF picked up on that and matched the groups up.