I found this referenced on another blog

Wrong Version (But Pass The Spell Check)
Eye halve a spelling chequer
It came with my pea sea
It plainly marques four my revue
Miss steaks eye kin knot sea.
Eye have run this poem threw it
I am shore your pleased two no
Its letter perfect awl the weigh
My chequertolled me sew.
~ Sores unknown ~

Correct Version
I have a spelling checker
It came with my PC
It plainly marks for my review
Mistakes I cannot see
I have run this poem through it
I am sure you are pleased to know
It’s letter perfect all the way
My checker told me so
~ Source unknown ~