Hi Joe, in analyzing our site, I found that when "Tweet This" is enabled in the blog, and the blog post title includes double quotes, they are not being escaped in the data-text generated code for the Tweet This widget. Instead you get something like this:
<a class="twitter-share-button" title="Tweet This" href="http://twitter.com/share" data-url="https://demo.mojoportal.com/test-with-double-quotes" data-text="Test with "double quotes"" data-count="horizontal">Tweet</a>
I'm not sure if the title double quotes interfere with anything else, I just happened to see the Tweet This issue.
Jamie