Est-ce que quelqu'un pourrais me dire ce que signifie cette erreur dans une page xhtml?
...pourtant ça semble correct ! et je suis bloqué à cause de ça:

Error Line 9 column 7: document type does not allow element "ul" here; missing one of "button", "map", "object", "ins", "del", "noscript" start-tag.

<p><ul><li><a href="pics/iron22.png">Iron Maiden 001 {695Ko}</li></a></ul><ul><

The mentioned element is not allowed to appear in the context in which you've placed it; the other mentioned elements are the only ones that are both allowed there and can contain the element mentioned. This might mean that you need a containing element, or possibly that you've forgotten to close a previous element.

One possible cause for this message is that you have attempted to put a block-level element (such as "<p>" or "<table>") inside an inline element (such as "<a>", "<span>", or "<font>").

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MERCI!!

salut.
L'erreur vient du fait que tu as mis une balise <ul> dans une balise <p> ce qui est contraire a la semantique html qui veut que les balises de type block ne doivent pas contenir de balises block mais inline

Merci de faire des titres explicites.

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aimak