Hi there Michał,
Don't worry, something that I'm very aware of.

You've probably noticed that there isn't the 'validation' logo on the 'main' pages of the website. The guys at
YaBB are far more proficient than me at website development and coding, hence the difference between the forum and the 'main' pages when a validation check is made. Whilst I updated a lot of the HTML and PHP in the '
Phase 3a / 3b' upgrades to the website, it's not perfect. However, as far as I'm aware, the pages do display fine in any browser which is important although not technically perfect.
As you've pointed out, the nuances between the various browsers are difficult and often annoying when attempting to create any kind of webpage these days. Not to worry, errors are always ironed-out as and when pages are updated.
A fair portion of the errors that are reported are actually within third-party links that are displayed on the pages - the
Amazon Widget and the
Waum link, for example.
Anyway, it's something that well become less and less frequent as and when the S.A. website's pages are updated.
D