James Blunt out of tune?

James Blunt's song "You're Beautiful" has some guitar work at the start that is obviously out of tune. Is it meant to be that way?
Mike - just listen to Bungalow Bill from the Beatles' White Album. The guitar intro is in completely different tune than Ringos voice when it comes in. The reason? Different takes, different musicians. Yet: I always wondered how this could get through with George Martins ears! I am sure Blunt isn't a better singer than Ringo was.....
Aida what you say is true, but the song was really written around John's voice. Ringo definitely sounds like some kid in the audience singing out of tune.
No way to know, but it's possible "Bungalow Bill" was meant to sound warped in this way.