Control Panel Redirect Loop After 2.6.1 Update

Question

I just updated from EE 2.5.1 to 2.6.1, and now I get a redirect loop error when I try to access the control panel via admin.php.

I cleared my cookies (and started testing in incognito mode to be safe), cleared my .htaccess file, and I added cookie variables to Master Config:

$env_config['cookie_domain'] = '';
$env_config['cookie_path'] = ''; 
$env_config['cookie_prefix'] = 'kg_' . ENV;

But that didn't fix the problem. What else should I try?

Answer 1

See if you were bitten by this bug: http://support.ellislab.com/bugs/detail/19378