diff -r 3b1da2848fc7 -r d3bac044e0f0 src/gui/kernel/qt_cocoa_helpers_mac.mm
--- a/src/gui/kernel/qt_cocoa_helpers_mac.mm	Fri Feb 19 23:40:16 2010 +0200
+++ b/src/gui/kernel/qt_cocoa_helpers_mac.mm	Fri Mar 12 15:46:37 2010 +0200
@@ -143,6 +143,9 @@
 
 void macWindowFade(void * /*OSWindowRef*/ window, float durationSeconds)
 {
+#ifdef QT_MAC_USE_COCOA
+    QMacCocoaAutoReleasePool pool;
+#endif
     OSWindowRef wnd = static_cast<OSWindowRef>(window);
     if (wnd) {
         QWidget *widget;
@@ -1278,4 +1281,17 @@
 }
 #endif
 
+QMacCocoaAutoReleasePool::QMacCocoaAutoReleasePool()
+{
+#ifndef QT_MAC_USE_COCOA
+    NSApplicationLoad();
+#endif
+    pool = (void*)[[NSAutoreleasePool alloc] init];
+}
+
+QMacCocoaAutoReleasePool::~QMacCocoaAutoReleasePool()
+{
+    [(NSAutoreleasePool*)pool release];
+}
+
 QT_END_NAMESPACE