diff --git a/resources/celerity/map.php b/resources/celerity/map.php
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -424,7 +424,7 @@
     'rsrc/js/application/maniphest/behavior-line-chart.js' => 'e4232876',
     'rsrc/js/application/maniphest/behavior-list-edit.js' => 'a9f88de2',
     'rsrc/js/application/maniphest/behavior-subpriorityeditor.js' => '71237763',
-    'rsrc/js/application/owners/OwnersPathEditor.js' => 'aa1733d0',
+    'rsrc/js/application/owners/OwnersPathEditor.js' => '996d62b9',
     'rsrc/js/application/owners/owners-path-editor.js' => '7a68dda3',
     'rsrc/js/application/passphrase/passphrase-credential-control.js' => '3cb0b2fc',
     'rsrc/js/application/pholio/behavior-pholio-mock-edit.js' => 'bee502c8',
@@ -764,7 +764,7 @@
     'maniphest-task-edit-css' => 'fda62a9b',
     'maniphest-task-summary-css' => '11cc5344',
     'multirow-row-manager' => 'b5d57730',
-    'owners-path-editor' => 'aa1733d0',
+    'owners-path-editor' => '996d62b9',
     'owners-path-editor-css' => '2f00933b',
     'paste-css' => '9fcc9773',
     'path-typeahead' => 'f7fc67ec',
@@ -1676,6 +1676,14 @@
       'javelin-mask',
       'phabricator-drag-and-drop-file-upload',
     ),
+    '996d62b9' => array(
+      'multirow-row-manager',
+      'javelin-install',
+      'path-typeahead',
+      'javelin-dom',
+      'javelin-util',
+      'phabricator-prefab',
+    ),
     '9a6dd75c' => array(
       'javelin-behavior',
       'javelin-stratcom',
@@ -1766,14 +1774,6 @@
       'javelin-fx',
       'javelin-util',
     ),
-    'aa1733d0' => array(
-      'multirow-row-manager',
-      'javelin-install',
-      'path-typeahead',
-      'javelin-dom',
-      'javelin-util',
-      'phabricator-prefab',
-    ),
     'ab2f381b' => array(
       'javelin-request',
       'javelin-behavior',
diff --git a/src/applications/owners/controller/PhabricatorOwnersDetailController.php b/src/applications/owners/controller/PhabricatorOwnersDetailController.php
--- a/src/applications/owners/controller/PhabricatorOwnersDetailController.php
+++ b/src/applications/owners/controller/PhabricatorOwnersDetailController.php
@@ -279,7 +279,7 @@
       $href = $repo->generateURI(
         array(
           'branch'   => $repo->getDefaultBranch(),
-          'path'     => $path->getPath(),
+          'path'     => $path->getPathDisplay(),
           'action'   => 'browse',
         ));
 
@@ -288,7 +288,7 @@
         array(
           'href' => (string)$href,
         ),
-        $path->getPath());
+        $path->getPathDisplay());
 
       $rows[] = array(
         ($path->getExcluded() ? '-' : '+'),
diff --git a/src/applications/owners/engineextension/PhabricatorOwnersPathsSearchEngineAttachment.php b/src/applications/owners/engineextension/PhabricatorOwnersPathsSearchEngineAttachment.php
--- a/src/applications/owners/engineextension/PhabricatorOwnersPathsSearchEngineAttachment.php
+++ b/src/applications/owners/engineextension/PhabricatorOwnersPathsSearchEngineAttachment.php
@@ -22,7 +22,7 @@
     foreach ($paths as $path) {
       $list[] = array(
         'repositoryPHID' => $path->getRepositoryPHID(),
-        'path' => $path->getPath(),
+        'path' => $path->getPathDisplay(),
         'excluded' => (bool)$path->getExcluded(),
       );
     }
diff --git a/src/applications/owners/storage/PhabricatorOwnersPath.php b/src/applications/owners/storage/PhabricatorOwnersPath.php
--- a/src/applications/owners/storage/PhabricatorOwnersPath.php
+++ b/src/applications/owners/storage/PhabricatorOwnersPath.php
@@ -49,6 +49,7 @@
     return array(
       'repositoryPHID' => $this->getRepositoryPHID(),
       'path' => $this->getPath(),
+      'display' => $this->getPathDisplay(),
       'excluded' => (int)$this->getExcluded(),
     );
   }
diff --git a/src/applications/owners/xaction/PhabricatorOwnersPackagePathsTransaction.php b/src/applications/owners/xaction/PhabricatorOwnersPackagePathsTransaction.php
--- a/src/applications/owners/xaction/PhabricatorOwnersPackagePathsTransaction.php
+++ b/src/applications/owners/xaction/PhabricatorOwnersPackagePathsTransaction.php
@@ -103,6 +103,26 @@
 
     $paths = $object->getPaths();
 
+    // We store paths in a normalized format with a trailing slash, regardless
+    // of whether the user enters "path/to/file.c" or "src/backend/". Normalize
+    // paths now.
+
+    $display_map = array();
+    foreach ($new as $key => $spec) {
+      $display_path = $spec['path'];
+      $raw_path = rtrim($display_path, '/').'/';
+
+      // If the user entered two paths which normalize to the same value
+      // (like "src/main.c" and "src/main.c/"), discard the duplicates.
+      if (isset($display_map[$raw_path])) {
+        unset($new[$key]);
+        continue;
+      }
+
+      $new[$key]['path'] = $raw_path;
+      $display_map[$raw_path] = $display_path;
+    }
+
     $diffs = PhabricatorOwnersPath::getTransactionValueChanges($old, $new);
     list($rem, $add) = $diffs;
 
@@ -111,12 +131,24 @@
       $ref = $path->getRef();
       if (PhabricatorOwnersPath::isRefInSet($ref, $set)) {
         $path->delete();
+        continue;
+      }
+
+      // If the user has changed the display value for a path but the raw
+      // storage value hasn't changed, update the display value.
+
+      if (isset($display_map[$path->getPath()])) {
+        $path
+          ->setPathDisplay($display_map[$path->getPath()])
+          ->save();
+        continue;
       }
     }
 
     foreach ($add as $ref) {
       $path = PhabricatorOwnersPath::newFromRef($ref)
         ->setPackageID($object->getID())
+        ->setPathDisplay($display_map[$ref['path']])
         ->save();
     }
   }
diff --git a/webroot/rsrc/js/application/owners/OwnersPathEditor.js b/webroot/rsrc/js/application/owners/OwnersPathEditor.js
--- a/webroot/rsrc/js/application/owners/OwnersPathEditor.js
+++ b/webroot/rsrc/js/application/owners/OwnersPathEditor.js
@@ -115,7 +115,7 @@
       JX.copy(
         path_input,
         {
-          value : path_ref.path || '',
+          value : path_ref.display || '',
           name : 'path[' + this._count + ']'
         });