Well, I just found a site reference showing the Mr. Key himself changed the words from time to time:

Immediately popular, it remained just one of several patriotic airs until it was finally adopted as the national anthem on March 3, 1931. But the actual words were not included in the legal documents. Key himself had written several versions with slight variations so discrepancies in the exact wording still occur.

http://www.ecwa.asn.au/info/lyrics.html#The

Edit: I just changed my spelling to the correct spelling of Key. Not that anybody except Wof and I care...