Null pointer exception - always

[pstjvn]

After upgrading to the newest release I seem to be unable to use the plugin. It always gives back an error even on simplest of files:

Errors occurred during the build.
Errors running builder 'Closure JavaScript Builder' on project 'test'.
java.lang.NullPointerException

I use it with Juno. Everything seems fine until I put some code to be compiled:

Initializing builder for: test
Start build: test
Computing project order
Updating referenced projects of: test
End build: test
Start build: test
End build: test
Start build: test
End build: test
Start build: test
Compiling /test/js/main.js
Start build: test
Compiling /test/js/main.js

Is there something missing? I use Java 7.