One weird thing I cannot figure out is:
I'm in a child site, http://child.mainsite.com. I click on the Products link on the sidebar to get into Marketpress.
However I get redirected to the Edit Profile page. Any page within Marketpress that I try to click (Products, Create New, Manage Orders, etc. EXCEPT Product Categories and Product Tags) does the same thing.
I am giving you more details of the dashboard of child site.
Market Press is installled there, kindly get back to me with the solution. I figured out that other users recently getting the same problem, so please confirm the solution.