Since 3.3 this can be done with a HTML/CSS Inserts -> CSS Insert
(Replace XX with the ID of the page)
HTML Code:
body#body-page-XX div.post-headline {
display: none;
}
For all pages (not just a specfic one)
HTML Code:
body.body-page div.post-headline {
display: none;
}
This is not perfect as the headline is still there, just not visible. Google might object to this. You can also try to move it off screen, this might be safer:
HTML Code:
body#body-page-XX div.post-headline {
margin-left: -9999em;
}
or
HTML Code:
body.body-page div.post-headline {
margin-left: -9999em;
}
A PHP based solution is planned for one of the next releases