GS3.1: Saving a page without a title clears page content.

[eatons]

Here's a workaround [based on using the Innovation template] find the following page slug:

<h1><?php get_page_title(); ?></h1>

... add a class of hide,

<h1 class="hide"><?php get_page_title(); ?></h1>

and include that class in it's style sheet:

.hide {display: none;}

if using html5, [ Don't use the custom fields plug-in] ... just set up your own titling setup, for instance in an Hgroup:
<hgroup class="your class">
<h1>
----TITLE----
</h1>
<h2>
----SUB TITLE----
</h2>
</hgroup>