Example document (extract) <form> <input type="email" name="email" /> <input type="submit" label="Submit" /> </form> When typing in the input field: "nathan@psi" and submitting the form a popup/tooltip appears with the text: "Enter an email" (manually translated from dutch, the correct english sentence will probably be different). The text message is compliant with the spec (a valid email should be entered), but this is exactly what I did, so it shouldn't complain. This happens in Chrome 10 (10.0.648.127, windows) and Chrome 11 (11.0.695.0, linux), but NOT in chrome 9 (9.0.597.107, linux). It works in firefox 4, and it should work as I see the spec. Also it says what you should do, but the check itself seems to be incorrect. (@psi is a valid domainname, its the name of my computer, the site where it is hosted is also @psi, so it should be able to contact it).