I have run into this issue:
http://unity3d.qatohost.com/questions/62968/http-put-in-unity-for-ios.html?sort=oldest
in Unity 3.3. As mentioned in the post by the other deveoper, My .NET POST code works just fine in the Unity editor, but throws the same exception when deployed to any iOS platform. Is this fixed in 3.4? Is it scheduled for a release yet?
Thank you for any information you can provide. Also if you have an issue tracking site or something similar that this is already listed in or that I can use in the future rather than posting here, certainly point me in that direction so I can self serve and not burn your cycles in here!