I just love this quote...

Some times ago, I by accident came across this quote by a Poet Janet Minor:

"I have a spelling checker
It came with my PC;
It plainly marks four my revue
Mistakes I cannot sea.
I've run this poem threw it,
I'm sure your pleased too no,
Its letter perfect in its weigh,
My checker tolled me sew.

I frequently come across code that resembles something like this passage; all syntactically correct but full of runtime error.