red error lines appears all the time in the template, despite being correct and compiling without error. A few recent encounters are text after @function are highlighted as unexpected token, a defined variable is not recognized, and reformatting sometimes breaks the template by doing actions such as converting documents.map { doc => ...} to documents.map { \n doc => ... }.

The fix will be available in the next nightly build: http://confluence.jetbrains.com/display/SCA/Play+2.0+plugin+...

Awesome. Looking forward to fixes and improvements. I'm already satisfied with using IntelliJ.