I'm having a problem with DDT. When I add a deployment package I'm able to create a package the first time I click on create package. However if I try to create a package more than once I get the following error. It's only happening on tables that I've added manually. The security tables added via the wizard are okay.

I will look at the timestamp problem you ran into, but I do not think this is a DDT issue at first glance.  I think the problem may be that you already have data in the table you are deploying to and you did not provide a defaul value or the column does not support NULL. 

As for the other error, this is probably accurate because we changed the way data gets deployed to support Vista.  I did not give you the framework DLLs so the DatabaseMigrator class is reading the package file differently.  For now, definitely revert back to your older version as the new data deployment has changed.  The EXE I gave you is packaging up the data for teh new format and your DbEngine DLL is trying to deploy on the old format.  Make sense?