WSS/MOSS SP1 application caused DCOM activation error

I applied the WSS 3.0 SP1 and MOSS SP1 to one of my MOSS installations and started getting the following errors:

Application Log
Event Source: Office SharePoint Server
Event Category: Office Server Shared Services
Event ID: 6482

The application-specific permission settings do not grant Local Activation permission for the COM Server application with CLSID
{3D42CCB1-4665-4620-92A3-478F47389230}
to the user HCHB\moss-svc-prd SID (S-1-5-21-796845957-484763869-839522115-12856). This security permission can be modified using the Component Services administrative tool.

System Log
Event Source: DCOM
Event Category: None
Event ID: 10016

The application-specific permission settings do not grant Local Activation permission for the COM Server application with CLSID
{3D42CCB1-4665-4620-92A3-478F47389230}
to the user HCHB\moss-svc-prd SID (S-1-5-21-796845957-484763869-839522115-12856). This security permission can be modified using the Component Services administrative tool.

I tracked down these class IDs and it turns out they belong to the OSearch DCOM application. I swear, I wish in this modern era that MOSS didn't use DCOM. To fix this, verify that your primary MOSS service account is in the Distributed COM Users group on the MOSS server. Then, in dcomcnfg, locate the OSearch application and choose Properties.

On the Security tab, click Edit on the Launch and Activation Permissions area and add the Distributed COM Users group to the ACL. Check both the Local Launch and Local Activation for this group. Restart OSearch (net stop osearch followed by net start osearch at a command prompt) and that should fix the problem.