To be exact, the Accelerator redirects with r=npwm when the password in the user's profile file does not match the profile stored in the cookie. (npwm-> No Passnord Match)
If this was a problem getting to the member profiles themselves, it'd be r=badnum or r=noprofile...
I'd suggest opening a support ticket
, including FTP information, so that we can perform some live troubleshooting.