mcseller on "[Plugin: Contact Form 7] W3C XHTML 1.0 Transitional Validation Errors"

I updated Contact Form 7 plugin to latest version, then I made a check on W3C and got following errors:

• there is no attribute "aria-required"
• there is no attribute "maxlength" (on a textarea)

By the way: I disabled on functions.php following row:
add_filter( 'wpcf7_support_html5', '__return_false' );

Thanks

http://wordpress.org/plugins/contact-form-7/