I had a minor issue with my Rails view when I had a list of radio buttons wrapped in labels. When there are form errors on a field like a radio button, Rails puts the CSS class .field_with_errors on that field. This causes some issues with alignment as seen in the screenshot below:

All you need to do to fix this is make the .field_with_errors class display inline like so:

.field_with_errors { display: inline; }