Arduino Leonardo functioning correctly?

I have recently purchased a new Arduino Leonardo and am having difficulties getting started. I have attached it to two different computers, one running Windows 8 and one running Vista; both recognize it and download drivers. However, neither can complete an upload of the Blink example program.

Of particular concern to me is that the "L" LED blinks continuously without stopping, even when not connected to either computer. Is that normal? I have tried resetting and reloading drivers with no change. Any ideas what to try next?

Skip this post. It's finally working!