I have had a bunch of bugs involving mostly the archive of all data. IN the screens where it shows your past few days calories burned, steps walked, and everything else, it has incorrect data shown. This messes up all the graphs and such. However, upon clicking on the days, it then shows the right values. This makes it hard to compare given days. It seems random to which days get messed up. For example, Tuesday this week my calories show as like 600 for the whole day, where as normally I should have 2500-3000.
I also have problems getting step counter to work for me. I get lots of phantom steps all day, particularly when I am biking around town.