diff -r 361389f3ad2b -r e00ce7077bfc controls/PouInstanceVariablesPanel.py
--- a/controls/PouInstanceVariablesPanel.py	Mon May 21 18:49:49 2012 +0200
+++ b/controls/PouInstanceVariablesPanel.py	Mon May 21 18:50:16 2012 +0200
@@ -179,6 +179,8 @@
                     
                     for button in buttons:
                         panel_sizer.AddWindow(button, 0, border=4, flag=wx.LEFT)
+                    panel_sizer.Layout()
+                    
                 else:
                     panel.Destroy()
                     panel = None