--- a/Viewer.py	Mon Dec 01 14:13:58 2008 +0100
+++ b/Viewer.py	Tue Dec 09 10:01:12 2008 +0100
@@ -23,6 +23,10 @@
 #Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 import wx
+if wx.VERSION >= (2, 8, 0):
+    USE_AUI = True
+else:
+    USE_AUI = False
 
 from plcopen.structures import *
 from PLCControler import ITEM_POU
@@ -2583,7 +2587,8 @@
         self.Scroll(x, yp)
         
     def OnMoveWindow(self, event):
-        self.GetBestSize()
+        if not USE_AUI:
+            self.GetBestSize()
         self.RefreshScrollBars()
         self.RefreshVisibleElements()
         event.Skip()