A huge thank you to everyone who took the time & trouble to make helpful suggestions. I incorporated all of them in a site update this morning. There is only so much one can do to 'tweak' a site in 'iWeb' to ensure it displays optimally in all browsers, so I've opted for a disclaimer on the first page that says the site is best viewed in 'Safari' (with a courtesy download link). My downloadable content should be ready in a week or two.
             The last word should go to Mr. Red (quoting from one of several incredibly helpful & detailed PMs)
                         "Asking opinions on Mudcat was the smartest move. We are a helpful lot."

                         How very true,
                                                   Kind Regards to All,
                                                                                     Nigel.