Hi,
I have your plugin working perfect on my webpage.
No wi have installed it on a different page and the laigment of the third button (google plus one) is wrong.
Using firebug i have notice that disabling the element-style
vertical-align:baseline;
the button came back to the right position.
Check the images:
http://awesomescreenshot.com/0bbp1pcea
And fixed:
http://awesomescreenshot.com/0edp1pd5c
Can you update the plugin to remove that?
Thanks