Apologies for this, but a bug crept past my notice in version 3.0.2. While fixing a bigger bug about breaking layouts, I inadvertently introduced a smaller one.
If you have upgraded to the new version you will see that the widget headings on the sidebars show up with some padding – white space or black space depending on which skin you are using. To temporarily remedy this, please go to Suffusion Theme Options -> Sidebars and Widget Areas -> Use JQuery to fix widget layout issues? Set this to use JQuery. This will fix the problem. I have already patched this. I will make a release soon, after which you can download the new version and roll back this option.
Apologies for the trouble.