diff --git a/doomsday/client/src/ui/framework/guirootwidget.cpp b/doomsday/client/src/ui/framework/guirootwidget.cpp
index 6cb2f2774e..129b49a6ae 100644
--- a/doomsday/client/src/ui/framework/guirootwidget.cpp
+++ b/doomsday/client/src/ui/framework/guirootwidget.cpp
@@ -30,7 +30,8 @@
 
 using namespace de;
 
-DENG2_PIMPL(GuiRootWidget)
+DENG2_PIMPL(GuiRootWidget),
+DENG2_OBSERVES(Widget, ChildAddition)
 {
     ClientWindow *window;
     QScopedPointer<AtlasTexture> atlas; ///< Shared atlas for most UI graphics/text.
@@ -49,7 +50,9 @@ DENG2_PIMPL(GuiRootWidget)
           atlas(0),
           uTexAtlas("uTex", GLUniform::Sampler2D),
           noFramesDrawnYet(true)
-    {}
+    {
+        self.audienceForChildAddition += this;
+    }
 
     ~Instance()
     {
@@ -166,6 +169,13 @@ DENG2_PIMPL(GuiRootWidget)
             }
         }
     }
+
+    void widgetChildAdded(Widget &child)
+    {
+        // Make sure newly added children know the view size.
+        child.viewResized();
+        child.notifyTree(&Widget::viewResized);
+    }
 };
 
 GuiRootWidget::GuiRootWidget(ClientWindow *window)
diff --git a/doomsday/client/src/ui/framework/guiwidget.cpp b/doomsday/client/src/ui/framework/guiwidget.cpp
index 747feac588..6e9de7b253 100644
--- a/doomsday/client/src/ui/framework/guiwidget.cpp
+++ b/doomsday/client/src/ui/framework/guiwidget.cpp
@@ -29,6 +29,7 @@
 using namespace de;
 
 DENG2_PIMPL(GuiWidget),
+DENG2_OBSERVES(Widget, ChildAddition),
 DENG2_OBSERVES(ui::Margins, Change)
 #ifdef DENG2_DEBUG
 , DENG2_OBSERVES(Widget, ParentChange)
@@ -76,6 +77,7 @@ DENG2_OBSERVES(ui::Margins, Change)
           uBlurStep     ("uBlurStep",  GLUniform::Vec2),
           uBlurWindow   ("uWindow",    GLUniform::Vec4)
     {
+        self.audienceForChildAddition += this;
         margins.audienceForChange += this;
 
 #ifdef DENG2_DEBUG
@@ -118,6 +120,16 @@ DENG2_OBSERVES(ui::Margins, Change)
     }
 #endif
 
+    void widgetChildAdded(Widget &child)
+    {
+        if(self.hasRoot())
+        {
+            // Make sure newly added children know the view size.
+            child.viewResized();
+            child.notifyTree(&Widget::viewResized);
+        }
+    }
+
     void initBlur()
     {
         if(blurInited) return;
diff --git a/doomsday/client/src/ui/widgets/dialogwidget.cpp b/doomsday/client/src/ui/widgets/dialogwidget.cpp
index 73070031a5..ea777a5ffb 100644
--- a/doomsday/client/src/ui/widgets/dialogwidget.cpp
+++ b/doomsday/client/src/ui/widgets/dialogwidget.cpp
@@ -490,10 +490,6 @@ void DialogWidget::prepare()
 
     d->updateContentHeight();
 
-    // Make sure the newly added widget knows the view size.
-    viewResized();
-    notifyTree(&Widget::viewResized);
-
     PopupWidget::open();
 }
 
@@ -507,6 +503,7 @@ void DialogWidget::preparePopupForOpening()
 
 void DialogWidget::finish(int)
 {
+    root().setFocus(0);
     close();
 }
 
diff --git a/doomsday/client/src/ui/widgets/legacywidget.cpp b/doomsday/client/src/ui/widgets/legacywidget.cpp
index 7c00984611..2b78696d38 100644
--- a/doomsday/client/src/ui/widgets/legacywidget.cpp
+++ b/doomsday/client/src/ui/widgets/legacywidget.cpp
@@ -18,6 +18,7 @@
 
 #include "de_platform.h"
 #include "ui/widgets/legacywidget.h"
+#include "clientapp.h"
 #include "ui/dd_input.h"
 #include "ui/ui_main.h"
 #include "ui/ui2_main.h"
@@ -147,7 +148,11 @@ LegacyWidget::LegacyWidget(String const &name)
 
 void LegacyWidget::viewResized()
 {
-    if(BusyMode_Active() || isDisabled() || Sys_IsShuttingDown()) return;
+    if(BusyMode_Active() || isDisabled() || Sys_IsShuttingDown() ||
+       !ClientApp::windowSystem().hasMain())
+    {
+        return;
+    }
 
     LOG_AS("LegacyWidget");
     LOG_TRACE("View resized to ") << root().viewSize().asText();
diff --git a/doomsday/client/src/ui/widgets/popupwidget.cpp b/doomsday/client/src/ui/widgets/popupwidget.cpp
index 2a64c1c4c7..c0aef4a378 100644
--- a/doomsday/client/src/ui/widgets/popupwidget.cpp
+++ b/doomsday/client/src/ui/widgets/popupwidget.cpp
@@ -201,7 +201,7 @@ DENG_GUI_PIMPL(PopupWidget)
     }
 };
 
-PopupWidget::PopupWidget(String const &name) : d(new Instance(this))
+PopupWidget::PopupWidget(String const &name) : GuiWidget(name), d(new Instance(this))
 {
     setBehavior(ChildHitClipping);
 
@@ -337,7 +337,8 @@ void PopupWidget::viewResized()
 
     d->uMvpMatrix = root().projMatrix2D();
 
-    update();
+    requestGeometry();
+    //update();
 }
 
 void PopupWidget::update()
@@ -400,8 +401,11 @@ void PopupWidget::open()
 
     // Reparent the popup into the root widget, on top of everything else.
     d->realParent = Widget::parent();
-    d->realParent->remove(*this);
-    d->realParent->root().add(this);
+    if(d->realParent != &d->realParent->root())
+    {
+        d->realParent->remove(*this);
+        d->realParent->root().add(this);
+    }
 
     unsetBehavior(DisableEventDispatchToChildren);
 
@@ -439,8 +443,11 @@ void PopupWidget::dismiss()
     d->dismissTimer.stop();
 
     // Move back to the original parent widget.
-    root().remove(*this);
-    d->realParent->add(this);
+    if(d->realParent != &root())
+    {
+        root().remove(*this);
+        d->realParent->add(this);
+    }
 
     popupDismissed();
 
diff --git a/doomsday/client/src/ui/widgets/sliderwidget.cpp b/doomsday/client/src/ui/widgets/sliderwidget.cpp
index 803ab98469..606c6b3164 100644
--- a/doomsday/client/src/ui/widgets/sliderwidget.cpp
+++ b/doomsday/client/src/ui/widgets/sliderwidget.cpp
@@ -459,9 +459,10 @@ bool SliderWidget::handleEvent(Event const &event)
         d->updateHover(event.as<MouseEvent>().pos());
     }
 
-    if(d->state != Instance::Inert && event.type() == Event::MouseButton)
+    // Left mouse button can be used to drag/step the value.
+    if(d->state != Instance::Inert)
     {
-        switch(handleMouseClick(event))
+        switch(handleMouseClick(event, MouseEvent::Left))
         {
         case MouseClickStarted:
             d->startGrab(event.as<MouseEvent>());