diff --git a/checkin_notes b/checkin_notes
index bb4477781c..f32c102ec9 100644
--- a/checkin_notes
+++ b/checkin_notes
@@ -6221,6 +6221,7 @@ Charlie 25 Oct 2012
     - Mac: Fix icons in Simple View Task and Project selection combo boxes.
     - Mac: Eliminate some unnecessary code.
     - Mac: Fix Quit command in Simple View and a crash bug with Quit AppleEvent.
+    - Fix a bad FlexGridSizer in Simple Preferences dialog which caused assert.
     
     clientgui/
         BOINCGUIApp.cpp
@@ -6228,3 +6229,4 @@ Charlie 25 Oct 2012
         mac/
             MacBitmapComboBox.cpp,.h
         sg_CustomControls.cpp,.h
+        sg_DlgPreferences.cpp
\ No newline at end of file
diff --git a/clientgui/sg_DlgPreferences.cpp b/clientgui/sg_DlgPreferences.cpp
index e1e018985f..52cf111c2b 100644
--- a/clientgui/sg_DlgPreferences.cpp
+++ b/clientgui/sg_DlgPreferences.cpp
@@ -276,7 +276,7 @@ void CPanelPreferences::CreateControls()
     wxBoxSizer* itemBoxSizer2 = new wxBoxSizer(wxVERTICAL);
     itemDialog1->SetSizer(itemBoxSizer2);
 
-    wxFlexGridSizer* itemFlexGridSizer3 = new wxFlexGridSizer(1, 1, 0, 0);
+    wxFlexGridSizer* itemFlexGridSizer3 = new wxFlexGridSizer(1, 0, 0);
     itemBoxSizer2->Add(itemFlexGridSizer3, 0, wxGROW|wxALL, 5);
 
     CTransparentStaticText* itemStaticText4 = new CTransparentStaticText( itemDialog1, wxID_ANY, _("This dialog controls preferences for this computer only."), wxDefaultPosition, wxDefaultSize, 0 );