Microsoft has just released KB Article 2830195:
FIX: Some newly added access accounts for a package may be missing on child sites in Systems Center Configuration Manager 2007 Service Pack 2
Symptoms
Consider the following scenario:
- You create a package in Microsoft System Center Configuration Manager 2007 Service Pack 2 (SP2).
- You assign multiple access accounts for the package.
- You update the package multiple times by adding additional access accounts.
In this scenario, more than 20 percent of the access accounts that you added to the package may be missing on child sites.
Full details: