I've made a ComponentRequestFilter to handle Locale issues... And if I request [ /t5app/Start ] page, my Filter code is executed. But, if I request the Application Root path [ /t5app or /t5app/ ] it ignores the Filter and avoids it.
Following [Thiago H. de Paula Figueiredo] comment:
I've looked at the sources and I've found that RootPathDispatcher, the dispatcher that handles the root URL, doesn't invoke the ComponentEventHandler, which is the pipeline that invokes the ComponentEventFilter's. This is a bug, so please file a JIRA about it.