Home screen doesn't use the full screen width So as of a couple days ago, something is different about my home screen(s). Where once the icons were evenly spread, now they're crammed to the left, leaving a bar of empty space in the right that just shows my wallpaper.

I could deal with this, but I can no longer swipe left from the right edge of the screen to get to my other home screens - it only works if I start the gesture on the part that has icons. How do I get the full width back?
The only thing I can think of is clearing the cache and data for your android launcher. If you go to settings -> application manager and then to all apps, you should eventually find your launcher. I would recommend taking some screenshots of how your home screen is organised before doing this though; this will end up getting rid of your home screen layout.