diff --git a/resources/celerity/map.php b/resources/celerity/map.php
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -13,7 +13,7 @@
     'core.pkg.js' => '599698a7',
     'darkconsole.pkg.js' => '1f9a31bc',
     'differential.pkg.css' => '7d4cfa59',
-    'differential.pkg.js' => '06cddcc0',
+    'differential.pkg.js' => '886eadff',
     'diffusion.pkg.css' => 'b93d9b8c',
     'diffusion.pkg.js' => '84c8f8fd',
     'favicon.ico' => '30672e08',
@@ -392,9 +392,9 @@
     'rsrc/js/application/dashboard/behavior-dashboard-tab-panel.js' => 'd4eecc63',
     'rsrc/js/application/diff/DiffChangeset.js' => 'cf4e2140',
     'rsrc/js/application/diff/DiffChangesetList.js' => 'a716ca27',
-    'rsrc/js/application/diff/DiffInline.js' => '4478f8ac',
-    'rsrc/js/application/diff/ScrollObjective.js' => '9df4e4e2',
-    'rsrc/js/application/diff/ScrollObjectiveList.js' => '085dd101',
+    'rsrc/js/application/diff/DiffInline.js' => '1478c3b2',
+    'rsrc/js/application/diff/ScrollObjective.js' => '7e8877e7',
+    'rsrc/js/application/diff/ScrollObjectiveList.js' => '6120e99a',
     'rsrc/js/application/diff/behavior-preview-link.js' => '051c7832',
     'rsrc/js/application/differential/behavior-comment-preview.js' => '51c5ad07',
     'rsrc/js/application/differential/behavior-diff-radios.js' => 'e1ff79b1',
@@ -779,7 +779,7 @@
     'phabricator-dashboard-css' => 'fe5b1869',
     'phabricator-diff-changeset' => 'cf4e2140',
     'phabricator-diff-changeset-list' => 'a716ca27',
-    'phabricator-diff-inline' => '4478f8ac',
+    'phabricator-diff-inline' => '1478c3b2',
     'phabricator-drag-and-drop-file-upload' => '58dea2fa',
     'phabricator-draggable-list' => 'bea6e7f4',
     'phabricator-fatal-config-template-css' => '8f18fa41',
@@ -799,8 +799,8 @@
     'phabricator-phtize' => 'd254d646',
     'phabricator-prefab' => 'c5af80a2',
     'phabricator-remarkup-css' => 'd1a5e11e',
-    'phabricator-scroll-objective' => '9df4e4e2',
-    'phabricator-scroll-objective-list' => '085dd101',
+    'phabricator-scroll-objective' => '7e8877e7',
+    'phabricator-scroll-objective-list' => '6120e99a',
     'phabricator-search-results-css' => 'f87d23ad',
     'phabricator-shaped-request' => '7cbe244b',
     'phabricator-slowvote-css' => 'a94b7230',
@@ -956,15 +956,6 @@
       'javelin-stratcom',
       'javelin-util',
     ),
-    '085dd101' => array(
-      'javelin-dom',
-      'javelin-util',
-      'javelin-stratcom',
-      'javelin-install',
-      'javelin-workflow',
-      'javelin-scrollbar',
-      'phabricator-scroll-objective',
-    ),
     '08f4ccc3' => array(
       'phui-oi-list-view-css',
     ),
@@ -990,6 +981,9 @@
       'javelin-dom',
       'javelin-typeahead-normalizer',
     ),
+    '1478c3b2' => array(
+      'javelin-dom',
+    ),
     '1499a8cb' => array(
       'javelin-behavior',
       'javelin-stratcom',
@@ -1203,9 +1197,6 @@
       'javelin-workflow',
       'javelin-workboard-controller',
     ),
-    '4478f8ac' => array(
-      'javelin-dom',
-    ),
     '44959b73' => array(
       'javelin-util',
       'javelin-uri',
@@ -1393,6 +1384,15 @@
       'javelin-stratcom',
       'javelin-dom',
     ),
+    '6120e99a' => array(
+      'javelin-dom',
+      'javelin-util',
+      'javelin-stratcom',
+      'javelin-install',
+      'javelin-workflow',
+      'javelin-scrollbar',
+      'phabricator-scroll-objective',
+    ),
     '61cbc29a' => array(
       'javelin-magical-init',
       'javelin-util',
@@ -1501,6 +1501,13 @@
     '7e41274a' => array(
       'javelin-install',
     ),
+    '7e8877e7' => array(
+      'javelin-dom',
+      'javelin-util',
+      'javelin-stratcom',
+      'javelin-install',
+      'javelin-workflow',
+    ),
     '7ebaeed3' => array(
       'herald-rule-editor',
       'javelin-behavior',
@@ -1671,13 +1678,6 @@
     '9d9685d6' => array(
       'phui-oi-list-view-css',
     ),
-    '9df4e4e2' => array(
-      'javelin-dom',
-      'javelin-util',
-      'javelin-stratcom',
-      'javelin-install',
-      'javelin-workflow',
-    ),
     '9f36c42d' => array(
       'javelin-behavior',
       'javelin-stratcom',
diff --git a/webroot/rsrc/js/application/diff/DiffInline.js b/webroot/rsrc/js/application/diff/DiffInline.js
--- a/webroot/rsrc/js/application/diff/DiffInline.js
+++ b/webroot/rsrc/js/application/diff/DiffInline.js
@@ -223,6 +223,7 @@
       var color = 'bluegrey';
       var tooltip = this._snippet;
       var anchor = this._row;
+      var should_stack = false;
 
       if (this._isEditing) {
         icon = 'fa-star';
@@ -244,6 +245,9 @@
       } else if (this._isGhost) {
         icon = 'fa-comment-o';
         color = 'grey';
+      } else if (this._replyToCommentPHID) {
+        icon = 'fa-reply';
+        should_stack = true;
       }
 
       objective
@@ -251,6 +255,7 @@
         .setIcon(icon)
         .setColor(color)
         .setTooltip(tooltip)
+        .setShouldStack(should_stack)
         .show();
     },
 
diff --git a/webroot/rsrc/js/application/diff/ScrollObjective.js b/webroot/rsrc/js/application/diff/ScrollObjective.js
--- a/webroot/rsrc/js/application/diff/ScrollObjective.js
+++ b/webroot/rsrc/js/application/diff/ScrollObjective.js
@@ -26,6 +26,7 @@
 
     _visible: false,
     _callback: false,
+    _stack: false,
 
     getNode: function() {
       if (!this._node) {
@@ -104,6 +105,23 @@
       return this;
     },
 
+
+    /**
+     * Should this objective always stack immediately under the previous
+     * objective?
+     *
+     * This allows related objectives (like "comment, reply, reply") to be
+     * rendered in a tight sequence.
+     */
+    setShouldStack: function(stack) {
+      this._stack = stack;
+      return this;
+    },
+
+    shouldStack: function() {
+      return this._stack;
+    },
+
     show: function() {
       this._visible = true;
       return this;
diff --git a/webroot/rsrc/js/application/diff/ScrollObjectiveList.js b/webroot/rsrc/js/application/diff/ScrollObjectiveList.js
--- a/webroot/rsrc/js/application/diff/ScrollObjectiveList.js
+++ b/webroot/rsrc/js/application/diff/ScrollObjectiveList.js
@@ -112,7 +112,8 @@
 
         items.push({
           offset: offset,
-          node: objective_node
+          node: objective_node,
+          objective: objective
         });
       }
 
@@ -130,7 +131,11 @@
         offset = item.offset;
 
         if (min !== null) {
-          offset = Math.max(offset, min);
+          if (item.objective.shouldStack()) {
+            offset = min;
+          } else {
+            offset = Math.max(offset, min);
+          }
         }
         min = offset + 15;