I found an incompatibility between shareaholic and the wordpress theme strikingR (http://themeforest.net/item/striking-multiflex-ecommerce-responsive-wp-theme/128763).
The strikingR theme supports different icon per shortcode (http://kaptinlin.com/themes/strikingr/shortcodes/typography/). For some icons and colors shareaholic sets a colored box around the icons (http://maphy-berlin.de/icon-prob/). When i deactivate shareaholic, then the colored boxed disappears.
Has anybody an idea to solve it?