Bad news.  The latest version (Build 2010-05-26) didn't work for me; it still is trying to build the absolute path (and subsequently failing).  For my staging environment, the function returns this...

 

http://acpportalstage.acponline.org/acpchapterportal/cutesoft_client/cuteeditor/Load.ashx?type=style&file=SyntaxHighlighter.css 

 

...when it should be returning a relative path like everything else.  Hence, the HTTPS mixed content warning.

 

*sadface*