I have a desktop and a laptop. I'm pretty sure earlier today when I played on the desktop I saw that the end-of game (and yes, I know in-game as well) graphs were two-tone lines. Now here on my laptop I can't see that. More specifically, it was as if every graph line on the map had a gray element that gave it more "finish" than just the single color of the graph line. And yes, this comp is also on level 0380.
Of course, the screen on the desktop is orders og magnitude better than the laptop screen, I think, as well as better resolution, so that may be it.
Edit: Fixed numerous spelling mistakes.
The graph lines do have a drop shadow. You probably can't see it since the contrast ratio on the lcd in your laptop is less than you desktop monitor.