1. Go here: http://apacheflexbuild.cloudapp.net:8080/job/MDLExample/lastSuccessfulBuild/artifact/examples/flexjs/MDLExample/bin/js-release/index.html <http://apacheflexbuild.cloudapp.net:8080/job/MDLExample/lastSuccessfulBuild/artifact/examples/flexjs/MDLExample/bin/js-release/index.html>
2. Click on Toggles You will see that the two IconToggles have no content. It seems like the Material Design font is not beiing used for some reason in the release build. The same thing works in the debug build. Harbs