When adding or editing quiz, in the category drop down quizes can view access by other teacher even if they don't have the access to view a quiz or not the owner of the said quiz.Its availble in the 1.2.1 version and other releases.
This is a feature, when "publish category" is turned on in the source category. See the "Edit categories" button on the quiz editing page.
Thanks for the verfication....
How about sharing files to another courses?