Hello ev'ryone. I may have been a bit misleading about the use of NS4.76. You can use this site with that browser. But it looks really rubbish if you have CSS enabled. I will work on an option to turn off CSS on these pages if you insist on using a dodgy browser. Anyway, let's let the play continue!
Ah yes, I did find the line saying something like if name contains 'bob' then ignore bad_html, so it turned out that deleting it sorted everything out!