Teachers cannot see hidden courses in hidden categories in the course listings.
1. Create a hidden category
2. Create a hidden course
3. Assign a teacher to the course
4. Log in as the assigned teacher - the course does not appear on the front page course listing, the user's profile page, or the user's myMoodle page.
Note that if the user does a search for the course, it will show up, and it is accessible. It looks like there was partial fix by
MDL-13900. However, I think it is still a problem that the user must search for the hidden course in order to find it in the first place.
Using 1.9 + (Build: 20080410). Also reproduced on demo.moodle.org, 1.9 + (Build: 20080414)