Freeagent 0 Newbie Poster

Hi - any help on this will be much appreciated! Until recently if I completed a web form (e.g. a book search on Abebooks.com) and received an unsatisfactory result I could use the back arrow to return to the form and simply edit my previous entries (e.g. correct a typo). When I use the back arrow now the web form is empty and everything needs to be re-entered from scratch. I've recently installed Norton Systemworks 2006 but can't find any settings in there that might account for this. I've also got autocomplete set up ok in Internet Explorer. Any ideas??? Many thanks.