XCode 4.6.3 iOs Build launch screen checkBytes issue

XCode 4.6.3 + iOs 6.0 SDK + Unity 4.1.5f1 free edition.

I´ve managed to make a build but it´s stucked in the startup sequence when it runs. The stacktrace shows the upper call is being made by "checkBytes". This lovely message appears in the console log: You are using Unity iPhone Basic. You are not allowed to remove the Unity splash screen from your game

I took a look into the community answers and found that it was a bug in Unity with some iOs SDKs versions, is this happening again with this combination of tools? Any clues on this? Thanks in advance.