If your iPhone is just showing a blank white box in its Camera Roll when you take a photo, here’s how you fix the problem.
1. Find this file on your computer and delete it:
f1b43d3b3ecf259a3626c13a8b0cebd8ba513117.mdbackup. Just do a search for it. It should be at the following:
C:\Documents and Settings\[username]\Application Data\Apple Computer\MobileSync\Backup\[gibberish]
2. Plug in your iPhone and Restore it from iTunes.
After the process is complete, your iPhone should take and save photos normally again. Kudos to jkeegan for figuring this out and posting it in Apple’s support forums.