the page where i get the error is:
you can access in this members area from any page, by putting username and password like:
then, click on the "xhtml 1.0 valid" w3 icon and it shows an error at:
Line 19 column 13: there is no attribute "height".
but if you look at the code of the page ("view source" browser option) you won't find the height attribute...
infact i uploaded many times the right html code, i validated by inputing the source code directly and it gives me a positive result!