- Create a category and check “Hide forum on the forum list”.
- Create a forum in that category.
- Create a new main menu item pointing to the category.
- Create a thread in the forum created in step 2.
- Log-In with a user that did not yet read the thread.
- Notice that the main menu item does not show that one thread is not yet read.
- Uncheck “Hide forum on the forum list”.
- Notice that the main menu item now shows that one thread is not yet read.
In addition: The “Forum” main menu item probably should not count threads in boards that are below a board that is hidden in the forum list. Only when a hidden forum is directly linked it (and it’s children) should be included in the counters.