diff --git a/src/common/sizer.cpp b/src/common/sizer.cpp
index a0ee65773c..dfe492531d 100644
--- a/src/common/sizer.cpp
+++ b/src/common/sizer.cpp
@@ -1114,16 +1114,29 @@ void wxFlexGridSizer::RecalcSizes()
 
 wxSize wxFlexGridSizer::CalcMin()
 {
-    int nrows, ncols;
+    int     nrows,
+            ncols;
+    size_t  i, s;
+
     if ( !CalcRowsCols(nrows, ncols) )
         return wxSize(10, 10);
 
+    // We have to clear the old sizes out if any item has wxADJUST_MINSIZE
+    // set on it.  Its probably quicker to just always do it than test for
+    // that though.  At least do it before resizing the arrays, SetCount will
+    // initialise new elements to zero.
+    for( s = m_rowHeights.GetCount(), i = 0; i < s; ++i )
+        m_rowHeights[ i ] = 0;
+
+    for( s = m_colWidths.GetCount(), i = 0; i < s; ++i )
+        m_colWidths[ i ] = 0;
+
     m_rowHeights.SetCount(nrows);
     m_colWidths.SetCount(ncols);
 
-    int                      i = 0;
     wxSizerItemList::Node   *node = m_children.GetFirst();
 
+    i = 0;
     while (node)
     {
         wxSizerItem    *item = node->GetData();
diff --git a/src/common/wincmn.cpp b/src/common/wincmn.cpp
index aa805541da..65d02ccc85 100644
--- a/src/common/wincmn.cpp
+++ b/src/common/wincmn.cpp
@@ -634,12 +634,8 @@ wxSize wxWindowBase::DoGetVirtualSize() const
 {
     wxSize  s( GetClientSize() );
 
-    if( m_virtualSize.GetWidth() != -1 )
-        s.SetWidth( m_virtualSize.GetWidth() );
-    if( m_virtualSize.GetHeight() != -1 )
-        s.SetHeight( m_virtualSize.GetHeight() );
-
-    return s;
+    return wxSize( wxMax( m_virtualSize.GetWidth(), s.GetWidth() ),
+                   wxMax( m_virtualSize.GetHeight(), s.GetHeight() ) );
 }
 
 // ----------------------------------------------------------------------------
diff --git a/src/generic/scrlwing.cpp b/src/generic/scrlwing.cpp
index f516a8552d..944ff42b1e 100644
--- a/src/generic/scrlwing.cpp
+++ b/src/generic/scrlwing.cpp
@@ -344,23 +344,18 @@ void wxScrollHelper::SetScrollbars(int pixelsPerUnitX,
     m_xScrollPosition = xPos;
     m_yScrollPosition = yPos;
 
+    int w = noUnitsX * pixelsPerUnitX;
+    int h = noUnitsY * pixelsPerUnitY;
+
     // For better backward compatibility we set persisting limits
     // here not just the size.  It makes SetScrollbars 'sticky'
     // emulating the old non-autoscroll behaviour.
 
-    wxSize sz = m_targetWindow->GetClientSize();
-#if 1
-    int x = wxMax(noUnitsX * pixelsPerUnitX, sz.x);
-    int y = wxMax(noUnitsY * pixelsPerUnitY, sz.y);
-#else
-    int x = noUnitsX * pixelsPerUnitX;
-    int y = noUnitsY * pixelsPerUnitY;
-#endif    
-    m_targetWindow->SetVirtualSizeHints( x, y );
+    m_targetWindow->SetVirtualSizeHints( w, h );
 
     // The above should arguably be deprecated, this however we still need.
 
-    m_targetWindow->SetVirtualSize( x, y );
+    m_targetWindow->SetVirtualSize( w, h );
 
     if (do_refresh && !noRefresh)
         m_targetWindow->Refresh(TRUE, GetRect());
@@ -891,16 +886,19 @@ void wxScrollHelper::DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) co
 // Default OnSize resets scrollbars, if any
 void wxScrollHelper::HandleOnSize(wxSizeEvent& WXUNUSED(event))
 {
-    if( m_win->GetAutoLayout() )
+    if( m_win->GetAutoLayout() || m_targetWindow->GetAutoLayout() )
     {
         if ( m_targetWindow != m_win )
             m_targetWindow->FitInside();
 
         m_win->FitInside();
 
-#if wxUSE_CONSTRAINTS
-        m_win->Layout();
-#endif
+        // FIXME:  Something is really weird here...  This should be
+        // called by FitInside above (and apparently is), yet the
+        // scrollsub sample will get the scrollbar wrong if resized
+        // quickly.  This masks the bug, but is surely not the right
+        // answer at all.
+        AdjustScrollbars();
     }
     else
         AdjustScrollbars();
diff --git a/src/gtk/scrolwin.cpp b/src/gtk/scrolwin.cpp
index ff1c2da0a0..9a792a679e 100644
--- a/src/gtk/scrolwin.cpp
+++ b/src/gtk/scrolwin.cpp
@@ -833,12 +833,19 @@ bool wxScrolledWindow::Layout()
 // Default OnSize resets scrollbars, if any
 void wxScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event))
 {
-    if( GetAutoLayout() )
+    if( GetAutoLayout() || m_targetWindow->GetAutoLayout() )
     {
         if( m_targetWindow != this )
             m_targetWindow->FitInside();
 
         FitInside();
+
+        // FIXME:  Something is really weird here...  This should be
+        // called by FitInside above (and apparently is), yet the
+        // scrollsub sample will get the scrollbar wrong if resized
+        // quickly.  This masks the bug, but is surely not the right
+        // answer at all.
+        AdjustScrollbars();
     }
     else
     {
diff --git a/src/gtk1/scrolwin.cpp b/src/gtk1/scrolwin.cpp
index ff1c2da0a0..9a792a679e 100644
--- a/src/gtk1/scrolwin.cpp
+++ b/src/gtk1/scrolwin.cpp
@@ -833,12 +833,19 @@ bool wxScrolledWindow::Layout()
 // Default OnSize resets scrollbars, if any
 void wxScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event))
 {
-    if( GetAutoLayout() )
+    if( GetAutoLayout() || m_targetWindow->GetAutoLayout() )
     {
         if( m_targetWindow != this )
             m_targetWindow->FitInside();
 
         FitInside();
+
+        // FIXME:  Something is really weird here...  This should be
+        // called by FitInside above (and apparently is), yet the
+        // scrollsub sample will get the scrollbar wrong if resized
+        // quickly.  This masks the bug, but is surely not the right
+        // answer at all.
+        AdjustScrollbars();
     }
     else
     {