Social Media Buttons

Here I added to the style sheet to accomodiate for a Facebook and
Twitter share button.  The specific scripts were placed right after end
of style sheet. Then buttons were positioned within the the caption
portion of the photo block so that they would appear on bottom left
corner of picture, and caption would be on bottom right.

The buttons operated correctly until not too long ago. I cannot quite
figure out what has changed, or if something has shifted with how tumblr
handles the code. My initial research led me to Sharethis.com, a place
where site publishers are lead to retrieve code for social media
buttons. But even on their site, any attempts to get such code for
tumblr leads to a blank slate, so perhaps the problem is widespread.