Hi sparanza,
Can you reproduce this issue on demo "http://www.ajaxuploader.com/Demo/select-multiple-files-upload.aspx"?
If so, please show me the steps. We will check it and get back to you as soon as possible.
If the demo work with your IE8, please download the latest version and try again.
Latest version downloads http://ajaxuploader.com/download/Ajax-Uploader.zip
Have you try on another pc? Do you get the same issue on your site?
Can you create a simple page like below and test it? Does it works with your ie8?
<%@ Page Language="C#" AutoEventWireup="true" %>
<%@ Register Assembly="CuteWebUI.AjaxUploader" Namespace="CuteWebUI" TagPrefix="CuteWebUI" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<CuteWebUI:Uploader ID="uploader1" runat="server">
</CuteWebUI:Uploader>
</div>
</form>
</body>
</html>
Keep me posted.
Regards,
Ken