They have: Andy Irvine changed two words in "Empty Handed", and his musical arrangement is very different - while the melody remains the same, there are some changes in the chord sequence. The result is a very beautiful and haunting version of the song; and I have now adopted one of the word changes.

Vin Garbutt changed the rhythm of The Flowers and The Guns, and introduced a slip into high register ("giving it wellie" as he calls it) in the last verse. I liked that, and though I could not copy him (I don't have his voice, after all!) I used the idea at a different point in the verse (where I could reach an octave higher).

Breezy's changed a few words here and there in my songs (he sings several), and I have accepted some of his changes into my own singing.

In all those cases, the changes all resulted in improvements to the songs.