Based on the output I am seeing, it is possible that the username field in the database could be blank, although I am not sure why the creator/updater links point to the correct profile in that case.
In your database, please try the following query:
Code:
SELECT * FROM vw_page
WHERE creatorid > 0 AND
creatorname = ''
ORDER BY dateline DESC
If there are recent results, then that is a problem.
Otherwise, the only thing I can think of right now without investigating your forum more closely is that your forum might have a plugin using hook fetch_musername that is setting a blank value to musername.
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