Which bootloader code are you using. This sounds like on of the Uno bootloader bugs that surfaced a while back. There is a newer version around that solves it, search around. I don't own a Uno so I haven't kept a link.
Lefty
Which bootloader code are you using. This sounds like on of the Uno bootloader bugs that surfaced a while back. There is a newer version around that solves it, search around. I don't own a Uno so I haven't kept a link.
Lefty