I recently started using IntelliJ for Scala development, and find it great overall but with one BIG annoyance: files containing errors are not highlighted (underwaved) in the project tree. For mixed Java/Scala projects, Java files with errors are highlighted though (using IntelliJ 12.1.4/build IU-129.713, Scala plugin 0.19.29).
Is this a known problem? Is there any fix planned? I couldn't find anything in the plugin's issue tracker.