The StrataFrameSample database has had many changes made to it between versions.  Including case sensitive changes, which the DDT now supports and recognizes as a field rename.  However, there is a minor issue that has already been verified and we will fix the issue and repost an update once resolved.  The issue only pertains to changing an existing fields name by changing the case sensitivity of the lettering without changing the actual name.  The error would look something list this:

Workaround
To work around this issue now, simply remove the StrataFrameSample database from your SQL Server install and re-run the StrataFrame installation (it is just fine to do a "Repair").  This database does not contain any pertinent StrataFrame data and is used only for sample purposes.  DO NOT REMOVE the StrataFrame database!  The StrataFrame database contains all of your BO Mappings, DDT Meta-Data, Security, and Loclization and Messaging data.  Remove only the StrataFrameSample database.