TCanvas with Mac OS X 10.5

Dear all,

I'm trying to have the latest Dev version 5.17/06 running with Mac OS X 10.5 (leopard).

I configured the source , simply with

./configure macosx --include-python

and successfully compiled and installed. It works, until when I try to open a TCanvas, I get the message below and no canvas appears.
What is wrong?
Should I compile with other options?

Many thanks in advance,
Federico

[pb-d-128-141-31-97:~] froncaro% root

• *
• W E L C O M E to R O O T *
• *
• Version 5.17/06 1 December 2007 *
• *
• You are welcome to visit our Web site *
• http://root.cern.ch *
• *

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ROOT 5.17/06 (trunk_at_21138, De 03 2007, 14:06:00 on macosx)

CINT/ROOT C/C++ Interpreter version 5.16.27, Oct 25, 2007 Type ? for help. Commands must be C++ statements. Enclose multiple statements between { }.

Welcome to ROOT!!!
  Root logon file is $HOME/.rootlogon.C
root [0] TCanvas *c1=new TCanvas("c1","c1",1) Warning in <TCanvas::ResizePad>: c1 width changed from 0 to 10

Warning in <TCanvas::ResizePad>: c1 height changed from 0 to 10

root [1] Received on Mon Dec 03 2007 - 16:56:01 CET