Revised site is fine when I preview but nothing happens when I hit publish site and when I upload and overwrite revised site the old version is still there. Using version 5.43 on Macbook Pro in Snow Leopard.
How are you uploading - through FW’s FTP or another method.
It sounds like you are not uploading to the correct place.
Or iIn some cases there can be excessive Server Cache which does not allow you to see revised content.