Follow scroll on clone element
This solves #10 for me.
I also need this:
source.bind("scroll change", function() {
Hey! Sorry for being so insanely late. I've been having some IRL issues. Hope it's OK.
Anyway, I just took a peek at the commit. Unfortunately, it didn't work for me.
Looks like this:

I'm using latest version of Chrome (version 45). The function (follow_scroll() triggers but it seems that .scrollLeft() on the clone doesn't work.
Hi! Hope all is well. My bad, I was only using textareas on my site, apparently the "scroll" event does not fire for text inputs. I've added more events (ugly, but I don't see any other way). d6fbb1e