2.7.1

Fixed

• Fix incorrect post ID reference preventing subtitle from saving.

2.7

Changed

• Trim subtitle by default.
• Apply wptexturize() on subtitle.
• Use WP_Subtitle class to manage post subtitle.

2.6

Security

• Sanitize $_REQUEST and $_GET when establishing post type in the admin.

Added

• Added quick edit support for subtitle. Props Fabian Marz and sun.
• Allow subtitle post meta key to be filtered using wps_subtitle_key.
• Add German translation. Props hatsumatsu.

2.5

Added

• Add [wp_subtitle] shortcode.

Fixed

• Do not use variable for textdomain - causes issues for parsers.

Changed

• Declare methods as public or private.

2.4.1

Fixed

• Fix PHP notice warning on 404 error page. Props Jay Williams.

Changed

• Add a little space above subtitle field when below title field in admin.

2.4

Added

• Add subtitle admin column.

2.3.2

Fixed

• Show subtitle admin field when adding new post. Props Gabriel Doty.

2.3.1

Security

• Ensure subtitles are sanitized when saving.

2.3

Fixed

• Prevent subtitle fields from displaying on post types for which support has not been added using add_post_type_support(). Previously the fields were displayed but the subtitle would not be saved.
• Escape subtitle admin field value - fixes issues with subtitles with quotes.

2.2

Added

• Added 'wps_subtitle_use_meta_box' filter to allow the edit field to be displayed in a meta box (the old way).

Changed

• Moved subtitle field from meta box to below title field in WordPress 3.5+ (props Tor Morten)