Abbot is not handling correctly the css definition of web fonts

In order to be usable by as many as possible browsers, web fonts are often defined using constructs like below. Unfortunately abbot doesn't like *'webfonts/wf.eot?#iefix'* because it uses the given path as it is, not ignoring everything beginning with "?". Is searching a file named *"wf.eot?#iefix"*
```css
@font-face {
  font-family: "wf";
  src: static_url('webfonts/wf.eot');
  src: static_url('webfonts/wf.eot?#iefix') format('embedded-opentype'),
       static_url('webfonts/wf.woff') format('woff'),
       static_url('webfonts/wf.ttf')  format('truetype'),
       static_url('webfonts/wf.svg#SSStandard') format('svg');
  font-weight: normal;
  font-style: normal;
}
```