I realize that 2.8.3 is in beta, installing it was an attempt to fix the issue we are having with WP 3.5.2 and the plugin 2.8.2. Passwords have been changed manually with the correct encryption, and via the dashboard with no success. We can still log into the dashboard with any user, just cannot log in to the hidden content with the plugin. We have also attempted to fix the issue by replacing all of the files in wp-admin and wp-includes with fresh copies. Any other suggestions?