Ben, I've had a look at this and I think you've already fix this. I can't see the white progress tick on the latest build (desktop or fab4).

However the tick's don't fill correctly, with partial ticks being coloured as it progresses. I have counted the ticks, and we have 72 across the screen. It won't be possible to make this look right without, say 50 or 100 ticks shown on the screen.

Options:
1. leave it as it is (maybe for MP)
2. new graphics with ticks that work for %ages (+ maybe a code change to render this correctly)
3. a code change to render this correctly, but jumpy progress.

Noah/Matt/Ben thoughts?

Yes, I did fix it. Sorry, didn't realize there was a bug open against it already.

As to the not filing correctly behavior, I don't really agree this is a problem. I've viewed the new behavior and think it looks entirely natural to have partially filled ticks. After all, it's not "done" yet... my 2 cents.

this has been fixed for a few days now

I didn't really notice the issue until I saw this bug.  I think it works fine, as Ben said partially-filled lines are OK I think.