Not sure if you are aware of this story but Joe Satriani is suing Coldplay for ripping off one of his tunes 'If I Could Fly'. I'm a little disappointed in Satriani, there's undoubted similarities but this does happen from time to time and I believe it's pure coincidence.

I don't believe for one second that when Chris Martin gets writers block he sticks on a Joe Satriani record for inspiration.

http://www.musicradar.com/news/guita...lawsuit-186464