A while ago I posted about a hidden feature that was needed if you want to use Managed Metadata columns in your SharePoint 2010 sites. We were doing some 2007-2010 migration work for a client recently that also involved exporting and importing sites and site collections to rework the content structure. Once we’d got the new structure sorted we discovered that content type replication was not occurring on the site collections we had imported. Some comparison of working and non-working SPSite properties with PowerShell later, we discovered that the culprit was the same hidden TaxonomyFieldAdded (ID 73ef14b1-13a9-416b-a9b5-ececa2b0604c) feature as I noted earlier. See my earlier post for instructions on enabling the feature.