Every time I try, I get the message "Failed to upload binary. The package name of the uploaded binary already belongs to an application by another vendor. Contact us for more information.". When I contact them about it, every time they just give me a canned answer telling me to rename the apk. I have done that several times with no luck. Since Amazon is being a bit unhelpful about this, I figured I would see if any of you guys have come across this.