Share This error on load

Hello,

I just installed version 2.1b1 of this Share This plugin and I am having two issues with it.

1) I am getting an error in bottom left hand corner of the screen when the page loads. Here is how the error reads:

Line: 586
Char: 66
Error: Expected ‘}’
Code: 0
URL: http://www.patersononline.net/potm

Once I click on the Share This icon at the bottom of a post, the error goes away.

2)The Share This icon only appears on two of my post but not on the others.

Thank you in advance for your help!