In the Assignments tool, after creating an assignment, you can switch to student view. There is a link just below the assignment that reads "Submit as Student." However, when you click on the link, it opens a student view of the assignment and there is an error message reading:
Alert: You are not allowed to submit to this assignment.
In the past, you've been able to submit an assignment as an instructor by default. However, now you need to have the Submit permission activated. I'm thinking that either the instructor should be able to submit by default, or the text "Submit as Student" should be changed so as not to be misleading.