Orange light, is a problem=

Hi! I'm new with Arduino. I bought an Arduino Mega 2560. I'm using Ubuntu 12.10. I've connected Arduino using an USB cable. In a tutorial I've read on Internet it says I should get an orange light blink and then a green light. The problem is when I connect the USB cable the orange light never dissapears.

I mean, I get the orange light blink, and I get the green light. But after the blink the orange light stays turned on. Is that a problem? Should I worry? I dont want to keep on with the tutorials because I'm afraid of damaging my Arduino or my notebook.

Sorry for my bad english. I hope someone can understand me :P.

That is what mine does and it works perfectly.

If by orange light you mean the led on pin 13, mine's often on too. I suppose it's the arbitrary condition of the pin?

Pin 13's led being on all the time does annoy me though, so I often just throw a line into setup to force it low.... saving a few nanoJoules of energy and thus doing my bit for the planet 8)