I noticed the error message below repeatedly in event viewer and realized it was happening every time a profile import was happening.

Event Type:    Error

Event Source:    Office SharePoint Server

Event Category:    Office Server General

Event ID:    7888

Date:        6/27/2008

Time:        11:37:17 AM

User:        N/A

Computer:    ServerName

Description:

A runtime exception was detected. Details follow.

Message: Access Denied! Only site admin can access Data Source object from user profile DB.

Techinal Details:

System.UnauthorizedAccessException: Access Denied! Only site admin can access Data Source object from user profile DB.

at Microsoft.Office.Server.UserProfiles.SRPSite.AdminCheck(String message)

at Microsoft.Office.Server.UserProfiles.DataSource._LoadDataSourceDef(IDataRecord rec)

at Microsoft.Office.Server.UserProfiles.DataSource._LoadDataSourceDef(String strDSName)

at Microsoft.Office.Server.UserProfiles.DataSource..ctor(SRPSite site, Boolean fAllowEveryoneRead)

at Microsoft.Office.Server.UserProfiles.DataSource..ctor(SRPSite site)

at Microsoft.Office.Server.UserProfiles.UserProfileConfigManager.GetDataSource()

at Microsoft.Office.Server.UserProfiles.BDCConnector.RefreshConfiguration(String sspName)

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

Turns out that on this server they had a least privileged install done. In this case you need to make sure that within the SSP you have granted your default content access account and your SSP application pool account the manage profile permission. If you need help with that check out this article I wrote on SSPs and their rights. http://msmvps.com/blogs/shane/archive/2007/08/06/give-a-user-access-to-the-ssp.aspx

Shane – SharePoint Consulting