The canvas may now be scrolled past the edge of the image
When holding the spacebar, you may scroll using the keyboard arrow keys (in addition to click-and-drag panning). Holding Ctrl will scroll at 10x the rate.
You can now hold Ctrl+Shift while clicking on the floating window icons in order to reset their location and docking. Ctrl+Shift along with the appropriate hotkey (F5, F6, F7, F8) also does the trick.
The rate of auto-scrolling, which triggers when the mouse is at the canvas edge and a button is being held down, has been improved and is based on time instead of frames
Fixed Size selection drawing now defaults to 400x300 pixels instead of 4x3 inches
...See Full Release Notes