allora vediamo un po'..
tutti gli articoli e le guide suggerite sono stati davvero utili.
sebbene ci siano ancora parecchi dubbi qualcosa comincia a muoversi 
dunque, ho fatto alcune pagine riuscendo a correggere tutti gli errori restituito dal W3C Validator, tranne questi due:
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Line 6, column 6: end tag for "HEAD" which is not finished
</head>
Most likely, You nested tags and closed them in the wrong order. For example
[i]...</p> is not acceptable, as [i] must be closed before
. Acceptable nesting is:
...</p>
Another possibility is that you used an element (e.g. 'ul') which requires a child element (e.g. 'li') that you did not include. Hence the parent element is "not finished", not complete.
✉
Line 8, column 6: document type does not allow element "TITLE" here
<title>Titolo della mia pagina</title>
The element named above was found in a context where it is not allowed. This could mean that you have incorrectly nested elements -- such as a "style" element in the "body" section instead of inside "head" -- or two elements that overlap (which is not allowed).
One common cause for this error is the use of XHTML syntax in HTML documents. Due to HTML's rules of implicitly closed elements, this error can create cascading effects. For instance, using XHTML's "self-closing" tags for "meta" and "link" in the "head" section of a HTML document may cause the parser to infer the end of the "head" section and the beginning of the "body" section (where "link" and "meta" are not allowed; hence the reported error).
-------
Questo è l'html di inizio pagina:
codice:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<head>
<style type="text/css">
@import url("layout.css");
</style>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<title>25° Tortellata Cremasca</title>
<body>
...
A quanto pare c'è qualcosa qui che non va ma non riesco a capire cosa..