One I learned from a vicar last night:

A man's wife died and he contacted the stonemason about putting up a headstone on her grave. He told the mason all the details and the asked if he could have the words "Lord She Was Thine" added at the bottom.
A couple of weeks later, the mason contacted the man to say that the job was done, so the man went over to the graveyard to have a look. To his horror he saw that the mason had missed a letter off the final line. So he went home, phoned the mason and told him he had missed a letter E off the end of the last line. The mason was very apologetic, and said he would attend to the matter right away. The next time the man went he saw "E Lord She Was Thin"!

and also:
A vicar was taking his ease on beautiful summer's evening, and looking out from the church door across the graveyard. He caught sight of a man in a very distraught state at one of the graves. He was tearing his hair and beating his breast in a most biblical fashion, and wailing, "Why, oh why did you have to die? How could you do this to me?"
At first the vicar didn't wish to intrude upon the man's grief, but in the end his sense of duty forced him over. He quietly went up to the man and gently spoke to him, "I don't want to pry, my son, but I sense you might feel better if you talked to somebody. I think you must have loved your wife very much to be so affected."
At this the man turned a despairing face to the vicar and sobbed, "WIFE? - it's her first husband!"

Andrea