The demo works.
Your work around:
- The code i see is different from what you have shown. I have <link type="text/css" rel="stylesheet" href='<%=ResolveUrl("Load.ashx?type=style&file=SyntaxHighlighter.css")%>' /> which could be because of version difference.
- Removing that line is not resolving the issue. Now i see test@import url(/css/cuteeditor.css); better than before, but not proper resolution.
Will try download the latest version and see if that resolves the problem