I read this post which answers a reader's question about how her additional mortgage payments were applied to her loan.
A short version of the question: She had been making additional payments on her mortgage, and her next payment is due officially in six months. This means she's been prepaying her mortgage payments instead of applying the additional payments to the loan principal immediately.
A short version of the answer: This isn't the best idea, as it doesn't reduce the amount of interest paid, and the bank holds the money, interest-free, until applying it to the loan balance. It would be best to request that the bank apply the extra payments "properly," or at least make sure that future additional payments are applied to reduce principal.
Use of the word "properly" -- which is what the blogger used in his answer -- bugs me a little bit because it makes it appear that making advance payments has little or no merit. What advantage could there be to "buying time" by getting ahead a few payments? I can't imagine that this argument is quite that one-sided, but I could be wrong! ;)

