Every time I run my markup through validation I get this error:

Error Line 131 column 6: character data is not allowed here.

<ul>���<li><a href="http://mysite.com/2006/11/30/chis-debu

You have used character data somewhere it is not permitted to appear. Mistakes that can cause this error include putting text directly in the body of the document without wrapping it in a container element (such as a <p>aragraph</p>) or forgetting to quote an attribute value (where characters such as "%" and "/" are common, but cannot appear without surrounding quotes).
I check my code and there's nothing there. What's causing this and how can I fix it? Thank you.