The site was launched in October 2013. It has been updated to the latest version of DNN, but since launch, remote users including site admins and superusers have been unable to upload files when editing content when in Internet Explorer (8-9). The site uses the CKHtmlEditorProvider.
Users are able to log in, Edit Content, access the Browse Server window, navigate folders within the Browse Server window, and browse for files using the Upload File link. However, when they click "Upload Now", the process times out every time.
These users are on the same network as myself, although in a remote location. I have never been able to duplicate the problem locally. In addition, these users have successfully been able to use the upload file process in other browsers, including Chrome and Firefox.