windows 7, firefox 14 there's a gray line where the background tile repeats:

<-- see here

Yeah at first I thought it was a line to start the game...like you pass it and the points start xD

This is true for me, too :)

Shows for me on Chrome, but I can't get a screen cap of it, because it actually scrolls down with the animation, flashing in and out. It starts about at the same place that 's image shows, though.

It happens a few times in the beginning and then fixes itself further in, so not sure whats up with that. :o

have been seeing it on firefox , very annoying :/

I have it too, but it doesn't interfere with the game so I don't really pay attention to it.

This is still an issue on this game.

I just tested, and this is still occurring.

Do you have any ideas on this?

Yeah, I know it's there but I have no idea why and it's not even there on every browser. Unfortunately it's a bug that's unlikely to be fixed.