Here are some screenshots. The highlighting is certainly less annoying with the github theme than with whatever theme I was previously using, but I still just prefer the markers. Maybe just habit at this point.

With Highlighting:
![1 with_highlight](https://f.cloud.github.com/assets/152152/344947/8632175c-9e10-11e2-941f-9a0cc12ee93f.jpg)

Without Highlighting
![withouth_highlighting](https://f.cloud.github.com/assets/152152/344949/897133f8-9e10-11e2-96e2-8112a503e4c2.jpg)