[curt.clifton]

In 1.7 when you change the view bar settings the current perspective is forgotten. (To see this, select the Due perspective and look at the title bar. Then change the view bar settings and watch the title bar.) This is an intentional change in the behavior to help new users distinguish between perspectives and the view bar.

What you want is to choose Perspectives → Save Windows As … → Due, and similarly for Flagged.

Cheers,

Curt