[SOLVED] Atahualpa & SermonBrowser Styling Conflict

I'm having a styling conflict between Atahualpa and a plugin (SermonBrowser). The plugin creates a list on the appropriate page. Each item in that list should be separated by a thin line (see example here: http://www.sermonbrowser.com/demo/) This is indeed what happens on my site with other themes.

But, Atahualpa (which I LOVE and don't want to leave), has something in its styling that's overriding the plugin style and I can't seem to find it.

I'm running Atahualpa 3.7.13
I'm running WordPress 3.8
My site is: www.witheecac.org
The page this styling conflict affects is: http://www.witheecac.org/sermon-audio/
The plugin website is: http://www.sermonbrowser.com/

Anyone out there able to help my track down the conflict?

Thanks!