This means the RTC is not advancing time. In light of my blog post yesterday (http://rayshobby.net/?p=5962) one thing to try is to adjust the position of the 32.768kHz crystal, and resolder its pins to make it as close as possible to the PCB. If this doesn’t work, there may be an issue with the crystal, and I can send you a replacement crystal if you email me your mailing address. Thanks.