reamigorena said:
How do I fix the errors reported by the w3c validator?"
One by one
OK, not very helpful.
You will just have to read each error, try to make sense of what it says,
and alter your HTML
Are you OK with editing the HTML?.
In FP2003, you click the Code tab at the bottom of the page, and then edit
as with any other text editor. Use CTRL-S to save