diff --git a/collects/mred/private/wx/cocoa/frame.rkt b/collects/mred/private/wx/cocoa/frame.rkt
index 4370a2ec..5536d187 100644
--- a/collects/mred/private/wx/cocoa/frame.rkt
+++ b/collects/mred/private/wx/cocoa/frame.rkt
@@ -12,6 +12,7 @@
          "cursor.rkt"
          "../../syntax.rkt"
          "../common/queue.rkt"
+         "../common/freeze.rkt"
          "../../lock.rkt")
 
 (provide frame%
@@ -55,9 +56,17 @@
       #f]
   [-a _void (windowDidResize: [_id notification])
       (when wxb
-        (queue-window*-event wxb (lambda (wx)
-                                   (send wx on-size 0 0)
-                                   (send wx clean-up))))]
+        (let ([wx (->wx wxb)])
+          (when wx
+            (queue-window-event wx (lambda ()
+                                     (send wx on-size 0 0)
+                                     (send wx clean-up)))
+            ;; Live resize:
+            (constrained-reply (send wx get-eventspace)
+                               (lambda () 
+                                 (pre-event-sync #t)
+                                 (let loop () (when (yield) (loop))))
+                               (void)))))]
   [-a _void (windowDidMove: [_id notification])
       (when wxb
         (queue-window*-event wxb (lambda (wx)
@@ -248,6 +257,8 @@
                         (for/or ([i (in-range (tell #:type _NSUInteger wins count))])
                           (let ([win (tell wins objectAtIndex: #:type _NSUInteger i)])
                             (and (tell #:type _BOOL win isVisible)
+                                 (or (not root-fake-frame)
+                                     (not (ptr-equal? win (send root-fake-frame get-cocoa))))
                                  win)))))))])
               (cond
                [next (tellv next makeKeyWindow)]
diff --git a/collects/mred/private/wx/cocoa/queue.rkt b/collects/mred/private/wx/cocoa/queue.rkt
index 1dcc21fc..9e96c79b 100644
--- a/collects/mred/private/wx/cocoa/queue.rkt
+++ b/collects/mred/private/wx/cocoa/queue.rkt
@@ -47,7 +47,10 @@
           (not (eq? (application-pref-handler) nothing-application-pref-handler))
           (super-tell #:type _BOOL validateMenuItem: menuItem))]
   [-a _BOOL (application: [_id theApplication] openFile: [_NSString filename])
-      (queue-file-event (string->path filename))])
+      (queue-file-event (string->path filename))]
+  [-a _void (applicationDidChangeScreenParameters: notification)
+      ;; Need to reset blit windows, since OS may move them incorrectly
+      (void)])
 
 (tellv app finishLaunching)
 
@@ -55,16 +58,6 @@
 (tellv app setDelegate: app-delegate)
 (tellv app activateIgnoringOtherApps: #:type _BOOL #t)
 
-#|
-(import-class NSNotificationCenter)
-(define-cocoa NSMenuDidBeginTrackingNotification _id)
-(tellv (tell NSNotificationCenter defaultCenter)
-       addObserver: app-delegate
-       selector: #:type _SEL (selector trackingMenuNow:)
-       name: NSMenuDidBeginTrackingNotification
-       object: #f)
-|#
-
 ;; ------------------------------------------------------------
 ;; Create an event to post when MzScheme has been sleeping but is
 ;;  ready to wake up
diff --git a/collects/mred/private/wx/cocoa/tab-panel.rkt b/collects/mred/private/wx/cocoa/tab-panel.rkt
index dec99d7c..d5f8a397 100644
--- a/collects/mred/private/wx/cocoa/tab-panel.rkt
+++ b/collects/mred/private/wx/cocoa/tab-panel.rkt
@@ -8,6 +8,7 @@
          "utils.rkt"
          "window.rkt"
          "panel.rkt"
+         "queue.rkt"
          "../common/event.rkt"
          "../common/procs.rkt"
          (for-syntax racket/base))
diff --git a/collects/mred/private/wx/cocoa/window.rkt b/collects/mred/private/wx/cocoa/window.rkt
index 1ff12848..b937b47b 100644
--- a/collects/mred/private/wx/cocoa/window.rkt
+++ b/collects/mred/private/wx/cocoa/window.rkt
@@ -512,6 +512,7 @@
     (define/public (set-size x y w h)
       (let ([x (if (= x -11111) (get-x) x)]
             [y (if (= y -11111) (get-y) y)])
+        (tellv cocoa setNeedsDisplay: #:type _BOOL #t)
         (tellv cocoa setFrame: #:type _NSRect (make-NSRect (make-NSPoint x (flip y h))
                                                            (make-NSSize w h)))))
     (define/public (move x y)
diff --git a/collects/mred/private/wx/common/clipboard.rkt b/collects/mred/private/wx/common/clipboard.rkt
index caee9e65..af22c334 100644
--- a/collects/mred/private/wx/common/clipboard.rkt
+++ b/collects/mred/private/wx/common/clipboard.rkt
@@ -27,6 +27,14 @@
     (void))
   (super-new))
 
+(define string-clipboard-client%
+  (class clipboard-client%
+    (init-field the-bytes)
+    (super-new)
+    (define/override (get-types) (list "TEXT"))
+    (define/override (get-data s)
+      (and (equal? s "TEXT") the-bytes))))
+
 (defclass clipboard% object%
   (init x-selection?)
 
@@ -44,12 +52,15 @@
     (send driver get-data type))
   (def/public (get-clipboard-string [exact-integer? timestamp])
     (send driver get-text-data))
-  (def/public-unimplemented set-clipboard-string)
-  
   (def/public (set-clipboard-client [clipboard-client% c]
                                     [exact-integer? timestamp])
     (send c set-client-eventspace (current-eventspace))
     (send driver set-client c (send c get-types)))
+  (def/public (set-clipboard-string [string? str]
+                                    [exact-integer? timestamp])
+    (set-clipboard-client (make-object string-clipboard-client% 
+                                       (string->bytes/utf-8 str))
+                          timestamp))
 
   (super-new))