Hmm, I am able to reproduce this problem with Debut, as well. And when I looked at my test blog with Benevolence this morning, it was displaying properly. But I see it's still too fast on your site, @americanelephant.
I've opened a bug report for this issue, and will let you all know when I have more information.
@americanelephant, as far as retiring themes goes, when themes gets to a certain age, they're sometimes retired. You're welcome to keep using Benevolence; I'm not sure if the snow issue is something else. But I'd encourage you to update anyway.
You can use your same background and header. You can preview and customize themes by using the Live Preview options below the themes in Appearance->Themes, so you can try them out before switching. If you decide to switch, go to Appearance->Widgets and drag all of your widgets into the Inactive Widgets area so that they're saved with their settings. Then, when you switch themes, you can drag them back into your new theme's sidebar area.