Game crashes on reuse of webcam texture in iphone and ipad

we are using WebcamTexture in our scene to capture photo. When we unload that scene and come again, game crashes on iphone and ipad, in android it works perfect.
We have stop() and destroy webcamtexture before switching scene. But it still got crashed when we try to call play() next time.

Issue is iOS7 + older than unity4.2.2 version

http://forum.unity3d.com/threads/202199-WebCamTexture-crash-xcode5

http://forum.unity3d.com/threads/201967-How-is-WebCamTexture-handled-when-component-is-disabled-or-when-leaving-app

https://fogbugz.unity3d.com/default.asp?565268_5utj1nfr7fd4q308