The page request for /admin/structure/block only returns part of the html and doesn't render it I'm logged in to Drupal and am requesting the blocks page at /admin/structure/block.  However, the page request doesn't render properly in my browser.  (I tried two different browsers with similar results).

The page I get begins with this:

d90
&gt;configure&lt;/a&gt;&lt;/td&gt;
        &lt;td&gt;&lt;a href="/admin/structure/block/manage/block/356/delete" id="edit-blocks-block-356-delete"&gt;delete&lt;/a&gt;&lt;/td&gt;
      &lt;/tr&gt;
                  &lt;tr class="draggable even"&gt;
        &lt;td class="block"&gt;Set Free - FAQ 1&lt;/td&gt;
        &lt;td&gt;&lt;div class="form-item form-type-select form-item-blocks-block-333-region"&gt;   &lt;label class="element-invisible"
for="edit-blocks-block-333-region"&gt;Region for Set Free - FAQ 1 block
&lt;/label&gt;  &lt;select class="block-region-select block-region-user_first
form-select" id="edit-blocks-block-333-region"
name="blocks[block_333][region]"&gt;&lt;option value="-1"&gt;- None
-&lt;/option&gt;&lt;option value="help"&gt;He


Or this:

10000 ion&gt;&lt;option value="map"&gt;Map&lt;/option&gt;&lt;option
value="preface"&gt;Preface&lt;/option&gt;&lt;option
value="breadcrumb"&gt;Breadcrumb&lt;/option&gt;&lt;/select&gt; &lt;/div&gt; &lt;input
type="hidden" name="blocks[block_110][theme]" value="omnia" /&gt; &lt;/td&gt;
        &lt;td&gt;&lt;div class="form-item form-type-textfield form-item-blocks-block-110-weight"&gt;   &lt;label class="element-invisible"
for="edit-blocks-block-110-weight"&gt;Weight for 30 DIGITAL TALENTS -
Home Corprate block &lt;/label&gt;  &lt;input class="block


or this:

a46c t form-select" id="edit-blocks-block-366-region"
name="blocks[block_366][region]"&gt;&lt;option value="-1"&gt;- None
-&lt;/option&gt;&lt;option value="help"&gt;Help&lt;/option&gt;&lt;option value="content"&gt;Content&lt;/option&gt;&lt;option value="top_first"&gt;Top
First&lt;/option&gt;&lt;option value="top_second"&gt;Top Second&lt;/option&gt;&lt;option
value="top_third"&gt;Top Third&lt;/option&gt;&lt;option value="top_fourth"&gt;Top
Fourth&lt;/option&gt;&lt;option value="social_top"&gt;Social Top&lt;/option&gt;&lt;option
value="search_form"&gt;Search Form&lt;/option&gt;&lt;option
value="logo"&gt;Logo&lt;/option&gt;&lt;option value="menu"&gt;Menu&lt;/option&gt;&lt;option
value="strapline_first"&gt;Strapline&lt;/option&gt;&lt;option
value="latest_first"&gt;Latest Work&lt;/option&gt;&lt;option
value="sidebar_first"&gt;Sidebar First&lt;/option&gt;&lt;option
value="sidebar_second"&gt;Sidebar Second&lt;/option&gt;&lt;option
value="postcontent_first"&gt;Post Content First&lt;/option&gt;&lt;option
value="team_first"&gt;Team First&lt;/option&gt;&lt;option
value="logoslider_first"&gt;Logo Slider First&lt;/option&gt;&lt;option
value="bottom_first"&gt;Bottom First&lt;/option&gt;&lt;option


Every page refresh is different.

Anyone have any ideas?

I have a custom module or two, but I don't think they are doing anything bad.  We haven't touched the theme. I've cleared Drupal's cache.  I can't see anything relevant in Drupal's log or the PHP error log.  Every other admin page works fine.  Any ideas?
I got it working.  This is what I did: I restarted Windows.