Just restarting springboard works, but I'm wondering if there's a way to stop it from ever happening.
What did you do? I just jb my 4s, and have never owned an iPhone before. I turned my phone off then back on, but its still white.
you can try this:
Sometimes it´s necessary to clean the icon cache of the iPhone: var/mobile/Libary/Caches/com.apple.IconsCache/....Delete all files in here...
Honestly I have no idea what that means, I come from android phones. I assume its through the computer, but I have no idea how to do that on a windows computer an a iPhone.