Some additional information:

Some objects being returned from AD have very large multi-valued attributes (for example, member). AD is returning them in the ";range" format, but they are not getting past back-meta. For example, a direct search for the object in AD will return stuff like this:

member;range=0-1499: CN=Alice Bar,OU=My-Company-Accounts,OU=User Accounts,OU=Common,DC=my-company,DC=com

but doing the same search through slapd/back-meta using the same credentials, the member attribute is not displayed at all. There are no attribute maps in place that would cause this.

-Matt