Here's the list of the community issues fixed on Jan 30th. Please leave a comment if you have any questions.
In addition, our user servers were updated to fix the issues with intermittent web notifications. This fix may have caused some users to lose their notification preferences. If you have any notification issues, please check your Notification settings and any boards/threads you have followed and reset them if necessary. From that point forward, all notifications and subscriptions should work consistently.