Our organisation uses a portal to let users view and update their personal information. The pages are set with a directive not to cache, yet they are still cached by many ISPs. In all cases except Vodacom's 3G service, the information can be retrieved by using the browser's Ctrl F5 forced refresh. With Vodacom, this does not work. Has anybody else experienced this? It can be embarassing, since people then see someone elses information, or worse, update the with the wrong information.