There's no different between the two right now, and I've still got some work to do on the logos, but you can see the beginnings of the alternate stylesheet at the top of the sidebar.

UPDATE

After some poking around on the WordPress support forums I figured out what was happening with the unintentional stylesheet changing. It turns out I had failed to follow instructions when installing the plug-in for mobile users (cell phones) and every time someone accessed Hoystory on a mobile device, it switched the theme back to WordPress' default. When I removed the default theme, the next mobile device user to access Hoystory brought the site down completely.

So, we're back to where we started. I'm still going to try to do a high-contrast version of this template, but I have to jigger some php code before that happens.

The kicker, right now, is that the categories list has now reverted to the previous version, with no identifiers which categories have more posts and which have the least. I can live with that for now.