Memory leak on McAfee Site Advisor

var g_pfnCreateEngine1 = null;

// sample code which causes one container to not be released in FF 10
function SampleCode1(domdoc)
{
    if (!g_pfnCreateEngine1)
    {
        var strJS = "function _SampleEvalFnc(d){return null;}"
        eval (strJS);
        g_pfnCreateEngine1 = _SampleEvalFnc;
    }

    // Uncommenting the next line causes the last compartment to be released
    // g_pfnCreateEngine1 = null;
}

var oSAPlg = {
    handleEvent : function(e) {
        try {
            switch(e.type) {
                case "DOMContentLoaded":
                    this.onDocumentComplete(e);
                    break;
                case "load":
                    this.onStartup();
                    break;
                default:
                    break;
            };
        } catch(e) {
        }
    },
    // The 'load' handler. Subscribes us to 'DOMContentLoaded' events.
    onStartup: function() {
        var appcontent = document.getElementById("appcontent");   // browser
        if(appcontent) {
            appcontent.addEventListener("DOMContentLoaded", this, false);
        }
    },
    // The 'DOMContentLoaded' handler. Demonstrates compartment leak.
    onDocumentComplete : function(e) {
        var doc = e.originalTarget;
        if (doc instanceof HTMLDocument) {
            var domdoc = doc;
            try
            {
                // Only run sample code on mcafee.com
                if(domdoc && domdoc.location
                            && domdoc.location.href
                            && domdoc.location.href.indexOf("mcafee.com", 0) != -1)
                {
                    SampleCode1(domdoc);
                }
                return;
            }
            catch(e)
            {
                alert("annotate: " + e.message);
            }
        }
    }
};

// Entry point
window.addEventListener("load", oSAPlg, false);