It would be great if you actually showed people how to FIX the problems they have with HTML. Like for example: "There is no attribute *whatever*"... If it's something commonly used like "topmargin," could you please tell us what we can put instead of that to get the same effect? Thanks.
For example, I was trying to help this site: www.graphixfantasy.com validate its stuff. But I can't help them because I don't know a replacement for a lot of the stuff that's "not real."
Most of the other errors can be fixed by removing the offending elements
and attributes and using CSS for presentation instead. eg. instead of
using <font> elements everywhere, use CSS to set the font appropriately
with the 'font-*'. Instead of using the background attribute, use the
CSS 'background-*' properties.
Don't use the marquee element, there is currently no CSS alternative
available but moving text is very bad for usability and accessibility