The colors in S1 v3 make it (at times) very hard to distinguish selected tracks and events from non-selected tracks/events. Regardless of the track color, or Appearance settings, the difference between a selected and non-selected item should always be clear.
The contrast ratio should be increased between selected and non-selected items.
Here's a real-world example (i.e. I didn't go out of my way to make it harder to see):
And the link: