Brand new xterra question

I just bought a 03 xterra XE-V6 and it seems like the rear axel is leaking. Is this simply overflow because it is brand new, or do you think it might be a major problem?

What's the location of the leak and what does it look like? Some are no big deal, others are warranty work.

It's not at all uncommon for the fill plug on the back of the diff to weep a tad. Run back to the dealer and have 'em fix it. When mine was doing it, they sent a guy under with a breaker bar to give it a crank right there and sent me on my way.

I called the dealer today and he was not all that suprised so I am going to take it by.