Hmmm. 10,000 posts on this.
Brake rotors for '04 and most of '05 were of poor design. They fixed the problem and introduced new rotors in May '05. There is a backlog for the replacements and supply hasn't caught up to demand yet. As a temp fix, Nissan is turning the rotors up to 3 times. This buys you about 10,000 miles and buys Nissan time to make the needed parts.
You are covered by warranty until fixed. Bring it to Nissan dealer. If they have the new parts in stock, you will get them. If they don't, you will go on a list until they arrive. In the mean time, there is no danger. This is not uncommon. For example, Sequioas had this problem for almost 3 years before Toyota acknowledged it.
BTW, there is a little button above called SEARCH

:whip: