An update has been released for Left 4 Dead 2. Tweaks to add-on management: - Report conflicts between mission scripts in the Add-ons menu. - Fixed checked items getting unchecked after reporting a conflict. - Allow all add-ons to override base content at the main menu. - Allow content-only add-ons on non-vanilla dedicated servers. - Allow add-ons to override base mission and mode scripts on non-vanilla servers.