After upgrading the plugin from 1.8 to 188.8.131.52 this weekend several of my WP Engine hosted sites have suffered from a 502 error message when trying to login to the admin area. The login screen appears but after putting in username and password, the site spins for several minutes then gives the 502 error.
After renaming the plugin folder for Ultimate Branding to force deactivation, login works again.
Is there a problem / bug???