Login redirect problem

Strange login redirect problem recently. I have no reason to think it's CB related, other than the CB module is involved in redirect, so I'm just asking if you've seen this problem elsewhere.

Intermittently, login redirects to a bogus page, like a test subdomain that no longer exists, or ftp.sitename.org, or even ww.w.sitename.org

I can't find any parameters to any extension that would do this, no DNS issues, etc. Again, just asking if you've seen this elsewhere.

Never seen such an issue. My best guess is you left a test redirect configured somewhere. Ensure live_site in configuration.php is empty then edit your CB Login Module and under Login Options ensure Login Redirection URL is also empty. If issue persists see if you've a Redirect action configured in CB Auto Actions (if installed) redirecting on a login trigger.