>Hi guys --
>Quick question. In one of my tables in my database, I had set up an index to be a candidate index. Today I realized it should merely be a regular index, so I changed it. My question is this: is this change reflected in the DBC only? Can I safely give my customer the updated DBC without causing problems in the affected table?
>

You really need to recreate the index, and rather than sending out a new .DBC, you'd be better off making the change programmatically using the ALTER TABLE...DROP UNIQUE TAG to remove the candidate key, and then recreating the index tag.