Hi chispa,
Please try demo http://www.ajaxuploader.com/Demo/select-multiple-files-upload.aspx with your chrome, does it get the same problem?
If the online demo works for you, I suggest you download the latest build and try again.
Latest build downlaod url: http://ajaxuploader.com/download/Ajax-Uploader.zip
If the latest build still get the same issue, please send me your uploader page url, so we can check it for you directly.
Kenneth@CuteSoft.net
Regards,
ken