Fixed the relative static file resolution of the CachedStaticFilesStorage...

                return matched

            name_parts = name.split('/')

            # Using posix normpath here to remove duplicates

            result = url_parts = posixpath.normpath(url).split('/')

            level = url.count('..')

            if level:

                result = name_parts[:-level - 1] + url_parts[level:]

            elif name_parts[:-1]:

                result = name_parts[:-1] + url_parts[-1:]

            joined_result = '/'.join(result)

            url = posixpath.normpath(url)

            url_parts = url.split('/')

            parent_level, sub_level = url.count('..'), url.count('/')

            if url.startswith('/'):

                sub_level -= 1

                url_parts = url_parts[1:]

            if parent_level or not url.startswith('/'):

                start, end = parent_level + 1, parent_level

            else:

                if sub_level:

                    if sub_level == 1:

                        parent_level -= 1

                    start, end = parent_level, sub_level - 1

                else:

                    start, end = 1, sub_level - 1

            joined_result = '/'.join(name_parts[:-start] + url_parts[end:])

            hashed_url = self.url(joined_result, force=True)

            # Return the hashed and normalized version to the file

            return 'url("%s")' % hashed_url

body {

    background: #d3d6d8 url("img/window.png");

}

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@import url("../cached/styles.css");

@import url("absolute.css");

body {

    background: #d3d6d8 url(img/relative.png);

}

 No newline at end of file