It appears what you need to make sure to do is add the Market’s CSS file to script/plugin that is doing the minification. This is the file:
After you do, you’ll need to flush your CDN cache and then wait as it can take time for the CDN caches to propagate.
After you do that, it should display fine.
If you choose a category, you’ll notice that it displays fine, that is because the site is not serving the minified files when query vars are being used. That’s how I know you need to make sure the Market CSS needs to be added to the minified file.
Hope that helps!