upgrading source base from 2.2.19 to 2.3.11

[Forest Hill <forest@apple.com>]

I'm in the process of upgrading our source base form 2.2.19 to 2.3.11 
and I've hit a bit of a snag here. I slapcat'ed my 2.2.19 database to 
a an ldif file, destroyed the database files, switched over to the 
2.3.11 executables and am now attempting to slapadd the ldif back in. 
I'm getting the following error for my domain object:

No objectClass for entry (dc=Forest-Dev,dc=local)
slapadd: dn="dc=Forest-Dev,dc=local" (line 11): (65) no objectClass attribute

which makes no sense because as you can see, the 3rd line of the 
entry is the objectClass:

dn: dc=Forest-Dev,dc=local
dc: Forest-Dev
objectClass: domain
structuralObjectClass: domain
entryUUID: 69190920-d6a9-1029-8aa4-a8fef5d1092a
creatorsName: uid=root,cn=users,dc=Forest-Dev,dc=local
createTimestamp: 20051021180822Z
entryCSN: 20051021180822Z#000001#00#000000
modifiersName: uid=root,cn=users,dc=Forest-Dev,dc=local
modifyTimestamp: 20051021180822Z

Anyone run into a similar problem during their own upgrade? My 
changes to the source base have been pretty minimal aside from a few 
schema extensions, and I've made sure that domain is defined in the 
schema.
--

Forest Hill
Apple Computer, Inc.
408-426-4141
forest@apple.com