To remove the extra 10px paddings surrounding the Shareaholic bar, add the following code to your style sheet.
Admin/Control Panel > Styles > Edit [YOUR STYLE] > Extra Properties
.shareaholic-canvas .shareaholic-share-buttons-container .shareaholic-share-buttons-wrapper ul.shareaholic-share-buttons {
margin: 0 auto !important;
padding: 0px 0px 0px 0px !important;
}
OR add it to the bottom of your styles/common.css file to apply the change to all styles.