The system.module declares file entity with 'static cache' = FALSE.
This results to the next behaviour when viewing a page with a file (using File Entity module):

1) The first call to the _menu_load_objects() is loading a file from the database in DrupalDefaultEntityController->load(), which never caches the result, since $entity->cache = FALSE.

2) All subsequent calls to the _menu_load_objects() (from _menu_translate() for example, which is called oftenly), makes DrupalDefaultEntityController->load() to load the entity again and again.

In my setup I see about 15 identical queries when viewing a page with single file entity. For example, every menu local task, makes a file to load again, since _menu_load_objects() is called for every item.

Is this by design or what? What's wrong with making file entities 'cacheable'?