I have a CSS file for a Wordpress theme whose icon is overlayed with a red "X". I can't find any errors in the file. The CSS is working properly on the site, and I tried turning off the CSS validator in preferences as recommended here.
Here is a screenshot of what the red X on the icon looks like:
Is this some other kind of validation I can turn off or is there something in the CSS I must fix to get Aptana to stop whining?