>>BTW, shouldn't it be "if it is not broken"? < g >
>
>"is not", usually abbreviated as "isn't". "ain't" (which replaces am not, is not, are not) is often used in popular speech, but that is more or less slang. According to the Oxford American Dictionary: "This word is avoided in standard speech except in humorous use, as in she ain't what she used to be.

Thanks :)