diff --git a/resources/celerity/map.php b/resources/celerity/map.php
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -7,7 +7,7 @@
  */
 return array(
   'names' => array(
-    'core.pkg.css' => '3ea6dc33',
+    'core.pkg.css' => '85a87a3e',
     'core.pkg.js' => '57dff7df',
     'darkconsole.pkg.js' => 'e7393ebb',
     'differential.pkg.css' => '2de124c9',
@@ -102,7 +102,7 @@
     'rsrc/css/application/tokens/tokens.css' => '3d0f239e',
     'rsrc/css/application/uiexample/example.css' => '528b19de',
     'rsrc/css/core/core.css' => 'a76cefc9',
-    'rsrc/css/core/remarkup.css' => '7afb543c',
+    'rsrc/css/core/remarkup.css' => 'f0999786',
     'rsrc/css/core/syntax.css' => '9fd11da8',
     'rsrc/css/core/z-index.css' => '57ddcaa2',
     'rsrc/css/diviner/diviner-shared.css' => 'aa3656aa',
@@ -757,7 +757,7 @@
     'phabricator-object-selector-css' => '85ee8ce6',
     'phabricator-phtize' => 'd254d646',
     'phabricator-prefab' => '666c80c5',
-    'phabricator-remarkup-css' => '7afb543c',
+    'phabricator-remarkup-css' => 'f0999786',
     'phabricator-search-results-css' => '7dea472c',
     'phabricator-shaped-request' => '7cbe244b',
     'phabricator-side-menu-view-css' => '91b7a42c',
diff --git a/webroot/rsrc/css/core/remarkup.css b/webroot/rsrc/css/core/remarkup.css
--- a/webroot/rsrc/css/core/remarkup.css
+++ b/webroot/rsrc/css/core/remarkup.css
@@ -121,36 +121,42 @@
   font-size: 24px;
   line-height: 1.625em;
   margin: 24px 0 4px;
+  clear: both;
 }
 
 .phabricator-remarkup h2.remarkup-header {
   font-size: 20px;
   line-height: 1.5em;
   margin: 20px 0 4px;
+  clear: both;
 }
 
 .phabricator-remarkup h3.remarkup-header {
   font-size: 18px;
   line-height: 1.375em;
   margin: 20px 0 4px;
+  clear: both;
 }
 
 .phabricator-remarkup h4.remarkup-header {
   font-size: 16px;
   line-height: 1.25em;
   margin: 12px 0 4px;
+  clear: both;
 }
 
 .phabricator-remarkup h5.remarkup-header {
   font-size: 15px;
   line-height: 1.125em;
   margin: 8px 0 4px;
+  clear: both;
 }
 
 .phabricator-remarkup h6.remarkup-header {
   font-size: 14px;
   line-height: 1em;
   margin: 4px 0;
+  clear: both;
 }
 
 .phabricator-remarkup blockquote {
@@ -518,6 +524,7 @@
 .phabricator-remarkup hr {
   background: {$thinblueborder};
   margin: 24px 0;
+  clear: both;
 }
 
 .phabricator-remarkup .remarkup-highlight {