Here is the page that I'm having trouble with: http://headchemists.com/Song.aspx?id=5

When you click on either "Original Vocal Mix" or "Instrumental Mix" a mp3 file should download.  It works correctly in FF / IE, but Safari downloads the mp3 as a .xhtml file.  Any help greatly appreciated!  Below is my handler code:

private int itemId = -1;

public void ProcessRequest(HttpContext context)
{
    context.Response.ClearHeaders();

    itemId = int.TryParse(context.Request.QueryString["id"], out itemId) == true ? itemId : -1;

    GetPackages get = new GetPackages();
    Item item = get.GetItem(itemId);

    Package package = get.GetPackage(item.PackageId);

    context.Response.AppendHeader("Content-Length", item.BinaryFile.Length.ToString());
    context.Response.ContentType = "audio/mpeg";
    context.Response.AppendHeader("Content-Disposition", "attachment; filename=\"" + package.Title.Replace(" ", "_") + "_(" + item.Title.Replace(" ", "_") + ")" + ".mp3\"");

    context.Response.OutputStream.Write(item.BinaryFile, 0, item.BinaryFile.Length);
    context.Response.End();
}