This is not a complaint but maybe a bug. I program radios for our SAR unit and we have some Baofeng UV5R radios. Using Chirp I programed my 4 with out any problem and saves the data. when i went to program some others they would not program no matter what i did , the popup said a bunch of stuff to include something about firmware? I think i am using the latest Version or chirp. this did this on two different computers. After trying different ways i change to the UV5 vip program and downloaded the data from a programmed radio , and uploaded to the 4 radios that would not program with chirp with out a problem? Also on Chirp I found when downloading from a programmed radio channel 0 and 2 do not always copy? both computers are using Windows 7