It appears url based images (inline) do not work with your hack. Had the same problem with the lytebox mod from another author too.
There are css errors also relating to the IE6 portion...
Code:
URI : http://www.talkjesus.com/clientscript/lightview/lightview.css
377 * html #lightview Value Error : margin-top Lexical error at line 377, column 89. Encountered: "?" (63), after : "" ? document.documentElement.scrollTop : 0) + (Lightview.navbarHeight | 0)) + 'px');
378 margin-left Value Error : margin-top Parse Error margin-left: expression( -1 * this.offsetWidth / 2 + (document.documentElement ? document.documentElement.scrollLeft : 0) + 'px');
381 margin-left Value Error : margin-top Parse error - Unrecognized }
384 html #overlay Value Error : height Lexical error at line 384, column 48. Encountered: "&" (38), after : "" && window.Enumerable.max) ? [document.body.scrollHeight, document.documentElement.scrollHeight, document.body.offsetHeight, document.documentElement.clientHeight].max() : document.documentElement.scrollHeight) + 'px' );
385 width Value Error : height Parse Error width: expression(((window.Enumerable && window.Enumerable.max) ? [document.body.scrollWidth, document.documentElement.scrollWidth, document.body.offsetWidth, document.documentElement.clientHeight].max() : document.documentElement.scrollWidth) + 'px' );
386 width Value Error : height Parse error - Unrecognized }