Choppy scrolling

Hello everyone!

I am having some trouble and was hoping someone could shed some light on this subject. I am building a game where I want to scroll the background horizontally as the player moves. The issue is that the scrolling always ends up choppy. The player can move at different speeds and I understand that at greater speeds the scrolling is going to look weird but even at slower speeds the scrolling “stalls” on some frames it seems.

This occurs even at 60 fps (scrolling an image). I update the position each frame and I even tried using delta but still no dice. I don’t have a concrete example but if you look at the scolling in this example demo it behaves the same - the background scrolling is not smooth.

http://activetuts.s3.cdn.plus.org/tuts/020_flixel/preview.html

Can anyone point me in the right direction here?

Thanks