using easel theme, since 2.8 (?), at some point log in returns 404 (but) I am logged in. The url for the 404 is domaindotcom/wpfolder/wpfolder/ - which should be domaindotcom/wpfolder/wp-admin/
Now the admin bar is up on the top so I just click dashboard or other links. All working.
The other thing that's happening is "empty spam" or "select-all/delete" (spam comments) takes me to my site's error page (not the wordpress 404 page like login does)
Checked settings in phpMyAdmin, all set that I know how to set.
All in One SEO Pack
Broken Link Checker
WP htaccess Control
I'm not sure but this may have happened with last wp update. Other themes not affected.
I guess thats about it.