Problem with RSS-feed

Hi there,

I seem to be having some trouble with my RSS feed. It’s throwing an error. Strangely, it works when I input it into “Mr Reader” (RSS app) but not via any of my browsers and when I try it in feedburner it says:

The URL does not appear to reference a valid XML file. We encountered the following problem: Error on line 11: The entity “laquo” was referenced, but not declared.

When I try to access it via Chrome I get the following error:

This page contains the following errors:

error on line 11 at column 32: Entity ‘laquo’ not defined
Below is a rendering of the page up to the first error.

My feed url is: [URL=”http://sims.sensiblycrazy.com/feed/”]http://sims.sensiblycrazy.com/feed/[/URL].

Does anyone know what I can do to fix this?