I am doing a SharePoint profile sync and got this error. What does the step MOSS_DELTAIMPORT even do? It looks like the step happens all the time. If this is skipped, will the Sync Service try it again? Is data lost or incomplete? I really have no idea how ForeFront works and all of this is through SharePoint. I am seeing this error, but everything worked before and everything looks like it is progressing. Please remember. I have no experience with ForeFront at all.

Ok this error does not mean that data is being lost. It does mean that with that error you aren't getting any new data. -- Going to look at your other thread David Lundell, Get your copy of FIM Best Practices Volume 1 http://blog.ilmbestpractices.com/2010/08/book-is-here-fim-best-practices-volume.html