I often used the space bar to advance the page in a resource. I find this feature no longer works. I have to either use the mouse or find and hit the small page up or page own button. I see carpal tunnel coming with any amount of extended reading.
Also, though each tabbed window in a layout has the resource tab for the active window, there is no visible way to identify which window is active (i.e. will respond to my page up/down). I find myself having to click the resource I wish to read just to make sure it is active.
Hopefully there will be a way to identify the active window and to scroll effectively through a resource in upcoming releases.