The widgets defined in plugins are not automatically added to dashboards anymore (for example Technical Debt, SIGMM, Taglist or Cobol widgets). They have to be explicitly added to the default dashboard :
Plugins can now be installed and upgraded directly from the SonarQubeweb application. Log in as administrator and browse to Configuration -> System -> Update Center. This feature requires the server to be connected to Internet. No personal data is sent to SonarSource servers.
If needed, HTTP or SOCKS proxy can be configured in conf/sonar.properties.
Findbugs is now executed in the same Java process than the Maven batch (see SONAR-1772). It implies that previous memory settings are removed from the Findbugs plugin. If analysis fail for out of memory reasons, then the memory allocated to maven batch should be increased (see the environment variable MAVEN_OPTS, for example : MAVEN_OPTS='-Xmx1024M -XX:MaxPermSize=128M')