diff --git a/Source/CandidateUI/VTCandidateController.m b/Source/CandidateUI/VTCandidateController.m
index 44e97db5..da5ab8d8 100644
--- a/Source/CandidateUI/VTCandidateController.m
+++ b/Source/CandidateUI/VTCandidateController.m
@@ -138,10 +138,10 @@
 - (void)setVisible:(BOOL)visible
 {
     if (visible) {
-        [[self window] orderFront:self];
+        [[self window] performSelector:@selector(orderFront:) withObject:self afterDelay:0.0];
     }
     else {
-        [[self window] orderOut:self];
+        [[self window] performSelector:@selector(orderOut:) withObject:self afterDelay:0.0];
     }
 }
 
diff --git a/Source/CandidateUI/VTHorizontalCandidateController.m b/Source/CandidateUI/VTHorizontalCandidateController.m
index b8b97665..f69affdd 100644
--- a/Source/CandidateUI/VTHorizontalCandidateController.m
+++ b/Source/CandidateUI/VTHorizontalCandidateController.m
@@ -52,7 +52,7 @@
     NSUInteger styleMask = NSBorderlessWindowMask | NSNonactivatingPanelMask;
     
     NSPanel *panel = [[[NSPanel alloc] initWithContentRect:contentRect styleMask:styleMask backing:NSBackingStoreBuffered defer:NO] autorelease];
-    [panel setLevel:CGShieldingWindowLevel() + 1];
+    [panel setLevel:kCGPopUpMenuWindowLevel];
     [panel setHasShadow:YES];
     
     self = [self initWithWindow:panel];
@@ -229,7 +229,7 @@
     frameRect.size = newSize;
     frameRect.origin = NSMakePoint(topLeftPoint.x, topLeftPoint.y - frameRect.size.height);
     
-    [[self window] setFrame:frameRect display:YES];
+    [[self window] setFrame:frameRect display:NO];
     [_candidateView setNeedsDisplay:YES];
     
 }
diff --git a/Source/CandidateUI/VTVerticalCandidateController.m b/Source/CandidateUI/VTVerticalCandidateController.m
index 7684806d..ba912e38 100644
--- a/Source/CandidateUI/VTVerticalCandidateController.m
+++ b/Source/CandidateUI/VTVerticalCandidateController.m
@@ -60,7 +60,7 @@ static const CGFloat kCandidateTextLeftMargin = 8.0;
     NSUInteger styleMask = NSBorderlessWindowMask | NSNonactivatingPanelMask;
     
     NSPanel *panel = [[[NSPanel alloc] initWithContentRect:contentRect styleMask:styleMask backing:NSBackingStoreBuffered defer:NO] autorelease];
-    [panel setLevel:CGShieldingWindowLevel() + 1];
+    [panel setLevel:kCGPopUpMenuWindowLevel];
     [panel setHasShadow:YES];
 
     self = [self initWithWindow:panel];
@@ -396,6 +396,6 @@ static const CGFloat kCandidateTextLeftMargin = 8.0;
     
     [_keyLabelStripView setFrame:NSMakeRect(0.0, 0.0, stripWidth, windowHeight)];
     [_scrollView setFrame:NSMakeRect(stripWidth + 1.0, 0.0, tableViewStartWidth, windowHeight)];
-    [[self window] setFrame:frameRect display:YES];
+    [[self window] setFrame:frameRect display:NO];
 }
 @end