Here are the positive results of dcdiag.exe on my root domain controller:
Domain Controller Diagnosis
Performing initial setup:
Done gathering initial info.
Doing initial required tests
Testing server: Default-First-Site\BARTER
Starting test: Connectivity
......................... BARTER passed test Connectivity
Doing primary tests
Testing server: Default-First-Site\BARTER
Starting test: Replications
......................... BARTER passed test Replications
Starting test: NCSecDesc
......................... BARTER passed test NCSecDesc
Starting test: NetLogons
......................... BARTER passed test NetLogons
Starting test: Advertising
......................... BARTER passed test Advertising
Starting test: KnowsOfRoleHolders
......................... BARTER passed test KnowsOfRoleHolders
Starting test: RidManager
......................... BARTER passed test RidManager
Starting test: MachineAccount
......................... BARTER passed test MachineAccount
Starting test: Services
......................... BARTER passed test Services
Starting test: ObjectsReplicated
......................... BARTER passed test ObjectsReplicated
Starting test: frssysvol
......................... BARTER passed test frssysvol
Starting test: kccevent
......................... BARTER passed test kccevent
Starting test: systemlog
......................... BARTER passed test systemlog
Running enterprise tests on : comcon.local
Starting test: Intersite
......................... comcon.local passed test Intersite
Starting test: FsmoCheck
......................... comcon.local passed test FsmoCheck