Reboted the iPhone, that fixed the problem.
You must be a Windows guy with all those reboots... :) But it's something to remember.
Rebooting may solve a lot of problems people are experiencing...one thing it does is close the 300 free apps you've opened and are being retained in IOS's new multi-tasking memory.
No app I've seen has a close button and so they all soak up scarce memory. Rebooting clears the memory...
We need an app to close all the open apps!