Error in Archive Manager Data Loader Event Log: "Email part 1 has invalid PurportedCheckSum." (4262763)

When running the Archive Manager Data Loader Services you may receive the following error:

DataLoader: [1749612380-1179854255-15-0x0] Exception has been caught - moving file [Drive]:\ArchiveManager\Error\\ [checksum].xml to error folder.
Exception Source: AfterMail EmailObjects
Exception Type: AfterMail.EmailObjects.CheckSumException
Exception Message: Email part 1 has invalid PurportedCheckSum.
Exception Target Site: CheckPurportedCheckSum
Date and Time: 2/06/2009 2:11:35 PM
Machine Name: [Computer Name]
IP Address: 10.60.100.132
Current User: [YourDomain]\ArchiveMgr_Journal
CLR Version: 2.0.50727.3082
Platform (version): Win32NT (5.2.3790.131072)
Application Domain: Archive Data Load Service.exe
Assembly Codebase: file:///C:/Program Files/ArchiveManager/Archive Data Load Service.exe
Assembly Fullname: Archive Data Load Service, Version=4.1.0.366, Culture=neutral, PublicKeyToken=null
Assembly Version: 4.1.0.366

---- Stack Trace ----
at AfterMail.EmailObjects.CheckSum2.CheckPurportedCheckSum(IEmailPart2 part, Guid[] checkSums)
at AfterMail.EmailObjects.CheckSum2.CalcCheckSums()
at AfterMail.EmailObjects.CheckSum2.GetCheckSum()
at AfterMail.DataLoader.Message2.Insert(IEmail2 email, Guid lockedCheckSum, IFolderInfo folderInfo)
at AfterMail.DataLoader.FileLoader.Load(FolderInfo folderInfo)

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

Product defect.

WORKAROUND

None.

STATUS

Waiting for fix in a future release of Archive Manager