sixhours - well I'm not working with a child theme, I'm working on a renamed twenty eleven.
Based on what you posted, I went back and looked at the code generated for the page I posted the link to:
<div id="content" role="main">
<article id="post-109" class="post-109 page type-page status-publish hentry">
<h1 class="entry-title">A Test Page</h1>
</header><!-- .entry-header -->
<p>Full text here. This is just to test the full width of the page here. This is just a test and will be deleleted soon. This is only a test.</p>
In any of that I don't see reference to .singular anywhere in the code.
I'm going to post what I just replied on someone else post that I read before I started this thread (someone replied to me there as well).
alchymyth - (thanks for the reply)
"It has a two column, right sidebar setting static page."
I'm fairly familiar with Twenty Ten, this is my first gander at Twenty Eleven. What has changed as far as creating new pages and their default settings?
I'm looking at the page in question in the admin and it is set to 'default' - but does not show any of the active widgets. The default in Twenty Ten was a two-col lay out with any active widgets showing in side bar. To get a one-col lay out with out the side bar you had to select it in the page template selector.
I guess I need to first understand what has changed in Twenty Eleven (instead of just being handed a 'fix'). :)
CAME BACK TO SAY: I'm reading this http://theme.wordpress.com/themes/twentyeleven/ now.
CAME BACK AGAIN: I just found the theme options in the admin - where it has choices for content on left, content on right, and one col no side bar. It is selected to content on left.
So compared to Twenty Ten - how do I select a "One Col No Sidebar" option? (now I'm really confused)