When OJS creates a journal, the URL is stored in several settings. If you change the URL, aside from making sure that your config.inc.php file contains the new URL, you may have to review your 5 pages of settings (e.g. page 5, in the Information textboxes) for incorrect URLs.
Public Knowledge Project Team
Don't miss the First International PKP Scholarly Publishing Conference
July 11 - 13, 2007, Vancouver, BC, Canada