Finally managed to fix the Social buttons in the bottom of the pages and posts of this site.

Thanks to Phillip of the Surrey Linux User Group for the CSS fix shown below:

div#addthisbox ul {
    list-style: none;
    margin-left: 0;
    padding-left: 0;
}
div#addthisbox li {
    display: inline;
    padding-right: 1em;
}

The fix goes in the file:

themes/<theme-name>/assets/css/theme.css

Where <theme-name> is the name assigned to your base based theme, if that makes sense.

The effect before the fix was the social buttons in the footer were shown, each on a new line but without returning to the left page-edge, like stairs. And I think the bullets were still visible when the buttons were hidden.

This has fixed the problem.

Base is a nice theme for a clean and crisp blog and site for the visually-impaired, like me, but it is also simple and pleasing to sighted surfers. Despite the fact base is really intended as the lowest level of the inheritance tree for Nikola themes.