The Isaiah scroll among the Dead Sea scrolls confirms the fact that there haven't been all the changes in the text so often claimed
i'm gonna go out on a limb here and say that faith is MOSTLY right.
if i recall, the copy of isaiah found in the dead sea scrolls is close to identical to modern masoretic text. it's been a while since my class, so i forget if it had the last few chapters (the 3rd isaiah) or not.
it does however confirm the accuracy of the masoretic text, IN THIS INSTANCE, to text at around the time christ. (300 years. wow. imagine us messing up what the consititution says... oh wait)
however, this just indicates that the second source was added to the text before it was included in the library. it's a last date for changes, not proof it's been the same all along. any child with a bible can pick up a copy of isaiah and note that sections are exactly the same as kings -- one of these two sources copied from the other, or a third source was used. so in essence, there's proof of change right there.
however, i will counter with a similar point.
TWO copies of jeremiah were found in the scrolls. and they are very, very different. which one is older?