Mr. G: You might want to take a look at this thread:
Lovecraft Leatherbound Edition
(check out posts 38 onward)
Yes, this is the corrected printing, the one poor Martin nearly lost his eyesight over, thanks to hours and hours spent comparing print and screen, various textual notes, etc. and that thread gives some pointers in what to look out for. According to the people at B&N I spoke to, there isn't an alteration in ISBN, but this may not be correct....