New features in 2.6.0.beta4
Bulk remove tags from selected topics
In addition to the ability to replace and append tags to topics in bulk, staff can now remove all tags from selected topics.
Allow sites to configure base font and heading font independently
Expanding upon improved font support added in beta3, admins can now set the heading font independently from the base font. This can be done via the wizard, or via site settings.
Explain to staff why invites are disabled
When SSO is enabled, or local logins are disabled via site settings, invites are disabled, as user management is handled by an external provider. If staff try to navigate directly to the invite page they will now see an explanation why invites are disabled.
Additional advanced search options
New advanced search options for min/max post count and view count have been added.
Styleguide plugin added to Discourse
To aid site admins in theming their site, the Discourse Styleguide plugin has been added to core Discourse. For more details, see Styleguide Plugin Now in Discourse Core