I upgraded just today. (I uninstalled FB4 Beta 1 first)
All my return data types configured in my data service view in Beta 1 were all reset to "object". I click on "Configure Return Type" button, and it worked for 2 of the data service items, but then quit working. I rebooted my PC, and reloaded FlashBuilder 4 Beta 2 and the button still doesn't work.
Is there some other condition that I don't know about that prevents the button from working? I skimmed the docs, but could find any mention of this, and the button doesn't give me any hint as to why it doesn't respond.
Is this a bug in b2? In b1, the button would always allow me to configure, even if the return type was already configured.