Evan,
DELETE TAG ALL, followed by expicit INDEX ON **** commands (to re-create previous tags), is usually the safest route. This removes all references of the tags, deletes the .CDX, and ensures the previous tags are created correctly.

-Just my .02 worth :-)....

Mark

>What is a safe way to rebuild the CDX? Should I delete all of the indexs (using the table properties screen) then delete the CDX file, then create a new one? Or can I simply delete the CDX? I don't want to corrupt this table.