Ho provato a validare la mia pagina XHTML...
ma questo è il risultato:
The detected DOCTYPE Declaration "<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">" has been suppressed and the DOCTYPE for "XHTML 1.0 Strict" inserted instead...