I thought the following might be of use to those of you who are still using Apache 2.0 with LDAP and wish to upgrade to 2.2. I found this basic information around online, but I had to search pretty hard for it. Perhaps presenting this in a more straightforward way might help the next searcher to find an answer more quickly. It's probably only of interest if you are using LDAP as your authentication system with an older Apache (e.g., 2.0) and have upgraded to 2.2 on an Ubuntu or Debian system (such as upgrading from dapper to gutsy.)
When running dapper on my intranet web server with Apache 2.0.55-4ubuntu2.2, I had something like this: