Just wanted to confirm Julie Be’s observation: I updated the plugin tonight, and the alignment is now a little cattywampus (and bummer about the twitter button, although not the fault of the plugin).
The label “Share This” is centered, but the buttons are now on a new line, left-aligned, whereas the whole thing used to be on one line, centered, and visually slick:
Example of new positioning
Changing just the css, btw, changes only the alignment of the label – e.g., if you change it to right aligned, “Share This” moves to the right margin – but not the buttons, which remain left-aligned on a separate line.