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Howmuch down and how much reserves. Also, what is the apraised value of the house verses your purchase price.
Neither of the three things (with proper documentation/explanantion) should be a problem but all three is a fairly short time period could be. On the good side, you have good mortgage history and a high FICO score. Right now, they can be picky about the 1 year without lates, but high scores I think will ease any concern on this. If you have reserves and or a decent down payment I would think you would be fine.
You have a lot going for you.... a short, succinct letter of explanation would satisfy most underwriters every time.
if you are using a broker, it will depend on where they sent the loan