Installer: improved installation process with less actions;
Widgets: now there is option to search right inside widget;
Extended text area with more options and visual improvements;
Replaced replies with response views on detailed page of response;
History: now you can track the progress of the response in the right panel;
Update subscribers while changing official answer;
Improved tagging system;
Cleaning Cache: now you can clean system cache from Administration page;
Sorting Options: integrated Move to and from top features to sort responses on home page;
Activation/Deactivation of any module to not loose your data;
SuperCache: you can turn it on in config file to cache full home page.
Themes: Fixed minor bugs in simple theme;
Activity Logs: fixed Last Month filter;
User Profile: users could access links/filters of other users that had guest role;
User Configs: if registered user didn't change profile, he had some invalid settings;
Side Widget: rebuild generation of image inside widget to make it compatible with most servers;
Roles Management: if title field was empty, after submit all page content disappeared;
When updating response, status has been dropped to default.
Moderation module: browse feature too long on big communities;
People: filtering took too long on big communities.
High Risk: Input passed via the "content" parameter to comments/add is not properly sanitized before being used. This can be exploited to insert arbitrary HTML and script code, which will be executed in a user's browser session in context of an affected site when the malicious data is being viewed.