I\'ve just upgraded my IntelliJ to 13.1. together with the angularjs plug. My problem is that the IDE doesn\'t recognize the angular directives anymore just saying \"unknown htm
There might be some conflict with the old version the AngularJs plugin you previously had installed.
Doing a File > Invalidate Caches and Restart > Invalidate and Restart
did solve the problem for me.
Intellij IDEA had to re-index the whole project, maybe the previously indexed things where using the old AngularJs Plugin scheme ...