Public Folder Replication Troubleshooting - Part 4: Exchange Server 2007/2010 tips

I've been trying to troubleshoot my replication problems between my old Exchange 2003 server that I'm hoping to decomission and the new 2007 server.

I'm getting these messages in the ContentConversion logs:

Microsoft.Exchange.Data.Storage.ConversionFailedException: Content conversion: Corrupt summary tnef content.
  at Microsoft.Exchange.Data.Storage.InboundMimeConverter.GetMimeMessageClass()
  at Microsoft.Exchange.Data.Storage.InboundMimeConverter.ConvertToItemInternal(MimePromotionFlags promotionFlags)
  at Microsoft.Exchange.Data.Storage.ConvertUtils.CallCts(Trace tracer, String methodName, String exceptionString, CtsCall ctsCall)
  at Microsoft.Exchange.Data.Storage.InboundMimeConverter.ConvertToItem(MimePromotionFlags promotionFlags)
  at Microsoft.Exchange.Data.Storage.ItemConversion.InternalConvertAnyMimeToItem(Item itemOut, EmailMessage messageIn, InboundConversionOptions options, MimePromotionFlags promotionFlags, Boolean isStreamToStream)
  at Microsoft.Exchange.Data.Storage.ItemConversion.ConvertAnyMimeToItem(Item itemOut, EmailMessage messageIn, InboundConversionOptions options, MimePromotionFlags flags)
InboundConversionOptions:
- preferredCharset: iso-8859-1
- trustAsciiCharsets: True
- isSenderTrusted: True
- imceaResolveableDomain: zog.com
- preserveReportBody: False
- clearCategories: True
- userADSession:
- recipientCache: Microsoft.Exchange.Data.Directory.Recipient.ADRecipientCache
- clientSubmittedSecurely: False
- serverSubmittedSecurely: True
ConversionLimits:
- maxMimeTextHeaderLength: 2000
- maxMimeSubjectLength: 255
-  maxSize: 2147483647
- maxMimeRecipients: 12288
- maxRecipientPropertyLength: 2000
- maxBodyPartsTotal: 250
- maxEmbeddedMessageDepth: 30
- exemptPFReplicationMessages: True


I just applied KB93600 but to no avail. Any more suggestions?

I noticed that there is a SP3 for Exchange 2003 out.. worth trying?

Should I just give up and try and archive to a PST all of the folders that are missing data that I can find?