diff --git a/src/applications/conpherence/__tests__/ConpherenceRoomTestCase.php b/src/applications/conpherence/__tests__/ConpherenceRoomTestCase.php
--- a/src/applications/conpherence/__tests__/ConpherenceRoomTestCase.php
+++ b/src/applications/conpherence/__tests__/ConpherenceRoomTestCase.php
@@ -100,6 +100,32 @@
       $conpherence->getRecentParticipantPHIDs());
   }
 
+  public function testRoomParticipantDeletion() {
+    $creator = $this->generateNewTestUser();
+    $friend_1 = $this->generateNewTestUser();
+    $friend_2 = $this->generateNewTestUser();
+    $friend_3 = $this->generateNewTestUser();
+
+    $participant_map = array(
+      $creator->getPHID() => $creator,
+      $friend_1->getPHID() => $friend_1,
+      $friend_2->getPHID() => $friend_2,
+      $friend_3->getPHID() => $friend_3,
+    );
+
+    $conpherence = $this->createRoom(
+      $creator,
+      array_keys($participant_map));
+
+    foreach ($participant_map as $phid => $user) {
+      $this->removeParticipants($user, $conpherence, array($phid));
+      unset($participant_map[$phid]);
+      $this->assertEqual(
+        count($participant_map),
+        count($conpherence->getParticipants()));
+    }
+  }
+
   private function createRoom(
     PhabricatorUser $creator,
     array $participant_phids) {
diff --git a/src/applications/conpherence/__tests__/ConpherenceTestCase.php b/src/applications/conpherence/__tests__/ConpherenceTestCase.php
--- a/src/applications/conpherence/__tests__/ConpherenceTestCase.php
+++ b/src/applications/conpherence/__tests__/ConpherenceTestCase.php
@@ -17,4 +17,19 @@
 
   }
 
+  protected function removeParticipants(
+    PhabricatorUser $actor,
+    ConpherenceThread $conpherence,
+    array $participant_phids) {
+
+    $xactions = array(id(new ConpherenceTransaction())
+      ->setTransactionType(ConpherenceTransactionType::TYPE_PARTICIPANTS)
+      ->setNewValue(array('-' => $participant_phids)),);
+    $editor = id(new ConpherenceEditor())
+      ->setActor($actor)
+      ->setContentSource(PhabricatorContentSource::newConsoleSource())
+      ->applyTransactions($conpherence, $xactions);
+  }
+
+
 }
diff --git a/src/applications/conpherence/__tests__/ConpherenceThreadTestCase.php b/src/applications/conpherence/__tests__/ConpherenceThreadTestCase.php
--- a/src/applications/conpherence/__tests__/ConpherenceThreadTestCase.php
+++ b/src/applications/conpherence/__tests__/ConpherenceThreadTestCase.php
@@ -86,6 +86,32 @@
       $conpherence->getRecentParticipantPHIDs());
   }
 
+  public function testThreadParticipantDeletion() {
+    $creator = $this->generateNewTestUser();
+    $friend_1 = $this->generateNewTestUser();
+    $friend_2 = $this->generateNewTestUser();
+    $friend_3 = $this->generateNewTestUser();
+
+    $participant_map = array(
+      $creator->getPHID() => $creator,
+      $friend_1->getPHID() => $friend_1,
+      $friend_2->getPHID() => $friend_2,
+      $friend_3->getPHID() => $friend_3,
+    );
+
+    $conpherence = $this->createThread(
+      $creator,
+      array_keys($participant_map));
+
+    foreach ($participant_map as $phid => $user) {
+      $this->removeParticipants($user, $conpherence, array($phid));
+      unset($participant_map[$phid]);
+      $this->assertEqual(
+        count($participant_map),
+        count($conpherence->getParticipants()));
+    }
+  }
+
   private function createThread(
     PhabricatorUser $creator,
     array $participant_phids) {
diff --git a/src/applications/conpherence/controller/ConpherenceNewController.php b/src/applications/conpherence/controller/ConpherenceNewController.php
--- a/src/applications/conpherence/controller/ConpherenceNewController.php
+++ b/src/applications/conpherence/controller/ConpherenceNewController.php
@@ -2,8 +2,7 @@
 
 final class ConpherenceNewController extends ConpherenceController {
 
-  public function processRequest() {
-    $request = $this->getRequest();
+  public function handleRequest(AphrontRequest $request) {
     $user = $request->getUser();
 
     $title = pht('New Message');
diff --git a/src/applications/conpherence/controller/ConpherenceNotificationPanelController.php b/src/applications/conpherence/controller/ConpherenceNotificationPanelController.php
--- a/src/applications/conpherence/controller/ConpherenceNotificationPanelController.php
+++ b/src/applications/conpherence/controller/ConpherenceNotificationPanelController.php
@@ -3,8 +3,7 @@
 final class ConpherenceNotificationPanelController
   extends ConpherenceController {
 
-  public function processRequest() {
-    $request = $this->getRequest();
+  public function handleRequest(AphrontRequest $request) {
     $user = $request->getUser();
     $conpherences = array();
     $unread_status = ConpherenceParticipationStatus::BEHIND;