Good eyes, was wondering if anyone would notice that change. Though it's a very small change isn't it? Here's the difference that I see in the default theme:
So the new version is slightly thicker and a hair shorter. I guess maybe your theme is using a custom font? I guess in that case things could be quite different.
Previously I was drawing a custom bullet by adding an attachment to the text, so I could draw exactly what I wanted. Unfortunately to make that work I needed to hack some underlying behavior, and unfortunately the crash that I was seeing went away when I removed that hack... so can't do that method now. Instead must just customize the bullet (which is represented by a simple dash) through font, color, or other text attributes.
What I'm doing right now (in the base style sheet is)
That text-expansion attribute is a bit odd, but if you want to get the default size add this to your own stylesheet:
So you can stretch/squish the bullet using text-expansion. Or if that still doesn't look good you can switch over to use an entirely different font.