Version 1.5.6 wont save settings

Hello,
I just upgraded to the latest version of Twitter Mentions, and am running WP 3.5.1. Everytime i tried to save my setting for the plugin, the page would refresh and show me 2 save settings success messages, but the settings are still the default values, including empty fields for the twitter api/secret keys.

I checked the db directly, and the values are not being saved. When i try to force edit in the db, and refresh the options page, the settings get reset to the default.

Tried uninstalling and reinstalling a few times, but the same issue.

Is anyone having the same issue? Any way around it?

Thanks, and thanks for the plugin!

https://www.ads-software.com/extend/plugins/twitter-mentions-as-comments/