th0th's quotes widget text overlapping

Hi, I’m using Catch box theme, and have installed the th0th’s quote widget. it works fine, but the ‘owner’ text overlaps the bottom of the widget box: see http://www.robinbeveridge.co.uk for an example. Not critical, but annoying. I can’t work out how to tweak the css to change this, or whether it’s an issue with th0ths quotes or with the catchbox theme, so am posting to both in hope of a resolution from one or other source.