Whenever I upgrade RSFTSB I need to go to line 283 in the r-s-f-t-s-b.php file and remove the text "Tweet" from the A HREF link on that line.
If I do not, when I view the front page of my site the "generated excerpts" for posts that have no preset excerpt all begin with "Tweet".
Once that text is removed, the problem is solved.
Perhaps that text can be removed or moved to the TITLE attribute of the A HREF or elsewhere to prevent this from appearing?
As you may have guessed, I show my links at the top of the post not at the bottom.