I've had my first nano for several months (maybe in fact a year), haven't used it much but i know I haven't been able to upload sketches without hitting the reset button manually... I just got 3 more nanos in and they all have that same problem...
I remember looking up this problem before and coming across maybe the bootloader might not allow an upload unless i manually hit reset, or maybe something about the nanos acting weird with UNIX based machine, i can't remember...
Any ideas folks?