tag_groups_allow_duplicate_group_names to allow duplicate group names.tag_groups_allow_duplicate_group_names to allow duplicate group names.tag_groups_custom_title to filter title attribute of tags in tag clouds per tag.tag_groups_custom_title to filter title attribute of tags in tag clouds per tag.excerpt_length now correctly counts words, not characters, when used with placeholder {excerpt_html}.{name} for custom title parameter that displays the tag’s name.custom_title_zero and custom_title_plural. They work like custom_title for tags with a post count of 0 or >1.{name} for custom title parameter that displays the tag’s name.custom_title_zero and custom_title_plural. They work like custom_title for tags with a post count of 0 or >1.timeout to set time of inactivity before search launches, in order to reduce server requests.