Big problem. Have a WP 3.5.1 site that I just started working on and all of a sudden, I can't get past the wp-login screen. I type in the correct username and password and it just redirects back to the wp-login screen.
First thought I had was to rename my plugins folder since I saw a lot of posts regarding that issue. So I changed it to plugins_old but nothing changed. Still get the loop. I then got rid of custom functions from my functions.php file. Nope. So the obvious issues you might expect aren't the issue here. Check .htaccess too and looked just fine. No issues there either. So why is this possibly happening?