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I have many XHTML 1.0 Strict pages with the validator button on them, for example http://www.wylie.org.uk/technology/semics/ThornAEI/ThornAEI.htm Until a few weeks ago the validator button showed validation pass. Now it shows errors for html that DOES NOT EXIST ON THE PAGE. Error Line 80, Column 6: required attribute "action" not specified <form><input type="button" value="Back" onClick="history.go(-1);return true;"> … I don't have any such line. Furthermore, validation of the source file passes without problems. This happens on many pages that I have not touched for ages. What the hell is going on? Andrew
I have now discovered that this happens when I use the Firefox browser. When I try Edge or Internet Explorer the button validates correctly! I'm utterly astonished by that - does your validator do browser-specific stuff? I guess that it must.