I noticed that in 2.7d, the jos_dtregister_user table no longer gets the field values written to it, only the userid, confirmnum and a couple others. I'm sending this data to a MSSQL server for additional parsing and if I stick with 2.7 I'll need to build a new (more complex) data import mechanism to pull from 2 tables - jos_dtregister_user and jos_dtregister_user_fields. Any chance this table can continue to be populated with the registration data? Or is this just a bug?
Yes, data is saved to jos_dtregister_user for the records. If you had some custom script written before, it will need modified as the field names are different now. All fields are now in the field manager like previous custom fields. So make sure all of the previously called default fields exist in the Fields Manager area. They should be there from install. Then make sure all of those fields (the ones needed) are enabled for your event.
If you need further assistance, log a support ticket... if you haven't already. Thanks.