I have had my fuelband (synched to my MAC) for about 1 month. It worked great and I loved it, however for some odd reason yesterday morning it just stopped registering activity and is stuck at 0. I have call Nike support, have soft & hard-reset the device multiple times, but cannot get it to work. I am extremely disappointed. Since I could not get this directly from the Nike store/website due to availability (believe me, I waited on-line several times when "more" became available) I ended up purchasing on eBay, so now I have no receipt to send back under the manufacturer's warranty for a replacement. Has anyone else had this problem and were you able to fix it??