diff -Nru oxide-qt-1.7.2/debian/changelog oxide-qt-1.7.3/debian/changelog
--- oxide-qt-1.7.2/debian/changelog	2015-04-21 19:11:11.000000000 +0000
+++ oxide-qt-1.7.3/debian/changelog	2015-04-22 20:54:38.000000000 +0000
@@ -1,4 +1,4 @@
-oxide-qt (1.7.2-0ubuntu0.15.04.1~ppa1) vivid; urgency=medium
+oxide-qt (1.7.3-0ubuntu0.15.04.1~ppa1) vivid; urgency=medium
 
   * Update to v1.7.2
     - Bump Chromium rev to 43.0.2357.18
@@ -19,6 +19,8 @@
       between the core library and the QtQuick library, making it more obvious
       where code should live
     - Fix LP: #1438902 - Enable webgl on mako
+    - Fix LP: #1446864 - OxideQQuickScriptMessage::reply doesn't work with
+      Qt 5.4
     - Use the simple backend for the network cache
     - Add EGLFS QPA support
     - Fix cross-compiling armhf builds on x86
diff -Nru oxide-qt-1.7.2/qt/quick/api/oxideqquickscriptmessage.cc oxide-qt-1.7.3/qt/quick/api/oxideqquickscriptmessage.cc
--- oxide-qt-1.7.2/qt/quick/api/oxideqquickscriptmessage.cc	2015-04-17 15:59:41.000000000 +0000
+++ oxide-qt-1.7.3/qt/quick/api/oxideqquickscriptmessage.cc	2015-04-22 19:24:41.000000000 +0000
@@ -79,7 +79,12 @@
 void OxideQQuickScriptMessage::reply(const QVariant& args) {
   Q_D(OxideQQuickScriptMessage);
 
-  d->proxy()->reply(args);
+  QVariant aux = args;
+  if (aux.userType() == qMetaTypeId<QJSValue>()) {
+    aux = aux.value<QJSValue>().toVariant();
+  }
+
+  d->proxy()->reply(aux);
 }
 
 void OxideQQuickScriptMessage::error(const QString& msg) {
diff -Nru oxide-qt-1.7.2/qt/VERSION oxide-qt-1.7.3/qt/VERSION
--- oxide-qt-1.7.2/qt/VERSION	2015-04-21 18:43:12.000000000 +0000
+++ oxide-qt-1.7.3/qt/VERSION	2015-04-22 19:59:28.000000000 +0000
@@ -1,3 +1,3 @@
 MAJOR=1
 MINOR=7
-PATCH=2
\ No newline at end of file
+PATCH=3
\ No newline at end of file
diff -Nru oxide-qt-1.7.2/shared/browser/oxide_browser_process_main.cc oxide-qt-1.7.3/shared/browser/oxide_browser_process_main.cc
--- oxide-qt-1.7.2/shared/browser/oxide_browser_process_main.cc	2015-04-17 15:59:41.000000000 +0000
+++ oxide-qt-1.7.3/shared/browser/oxide_browser_process_main.cc	2015-04-22 19:17:39.000000000 +0000
@@ -261,6 +261,9 @@
   if (IsEnvironmentOptionEnabled("NO_SANDBOX")) {
     command_line->AppendSwitch(switches::kNoSandbox);
   } else {
+    // See https://launchpad.net/bugs/1447311
+    command_line->AppendSwitch(switches::kDisableNamespaceSandbox);
+
     if (IsEnvironmentOptionEnabled("DISABLE_SETUID_SANDBOX")) {
       command_line->AppendSwitch(switches::kDisableSetuidSandbox);
     }