There are threads on this already. Reboot the phone. Fixes it.
I figured it would be a software thing, but let's be fair just because people know doesn't mean it's not really, really poor quality control by Apple.
And the picture opportunity will always be gone in the time it takes to reboot the phone; this is not 'a fix'.
This is the first time I've bought an Apple product and felt cheated and angry more than happy and pleased, and I switched from PCs about ten years ago, and have owned every iPhone.
Don't mix QC of the iPhone 5 with a software flaw.
Please don't patronise me. I don't mean the current QC debate about Foxcon, I mean QC in the general sense. Which, I assume covers software too. Like in any other organisation. If I bought a camera from Canon with bad firmware I'd still be angry about it. I am not an Apple apologist I generally like Apple products, but I don't feel the need to defend them when, as here, they've clearly made a mistake / an inferior product. Why do you?