The JS files generated by Lino in the cache (media/cache/js/lino_NNN_XX.js) are automatically rebuilt when code has changed (e.g. "touch settings.py"). But it can happen that a simple Ctrl-R in the clients's browser is not enough, their browser continues to use the old version from its own cache. In Chromium they must do Shift+Ctrl+R. But that causes occasional misunderstandings. A simple Ctrl-R should be enough. Probably caused by a wrong Apache config.