Using autocomplete = "off" at the password input has such an effect on the entire form, and not just on the password field.
This does not apply to Safari 5.
Even adding autocomplete = "on" to other fields that don't work.
<form name="login" method="post" action="login.html" > E-mail<br/> <input name="email" type="text" ><br/> Password<br/> <input name="password" type="password" autocomplete="off" > </form>
source share