I can confirm this bug in 15.04. This should be a simple fix of including unity-webapps-common in the package dependency.
** Summary changed: - The following schema is missing com.canonical.unity.webapps In order to work properly, Unity Tweak Tool recommends you install the necessary packages + Package missing dependency: unity-webapps-common (The following schema is missing com.canonical.unity.webapps) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1444315 Title: Package missing dependency: unity-webapps-common (The following schema is missing com.canonical.unity.webapps) To manage notifications about this bug go to: https://bugs.launchpad.net/unity-tweak-tool/+bug/1444315/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs