This all started because I got the text version of the admin panel so decided to do a clean install (after trying everything else).
Now I get to the "Welcome" page, enter my details (site title, user name, password twice), click "Install WordPress" and it just goes back to the same page i.e. http://www.mywebsite/wp-admin/install.php?step=2 but with all my information removed.
I have re-installed, cleared the browser cache, restarted, tried it in both Firefox and Safari, checked permissions and basically anything else I could find by trawling the internet. I am not a total newbie to this and have had successful installs before.
Anyone have any ideas?