I think this because you don't have a </a>. change
HTML Code:
<a href="http://twitter.com/DeltaWhiskey1" target="_blank">
<img src= "http://www.sereas.com/dwblog/wp-content/uploads/2009/07/CamiTwit.jpg">
to
HTML Code:
<a href="http://twitter.com/DeltaWhiskey1" target="_blank">
<img src= "http://www.sereas.com/dwblog/wp-content/uploads/2009/07/CamiTwit.jpg"></a>
in your first text widget in the left sidebar