17 Dec
                
                    2007
                
            
            
                17 Dec
                
                '07
                
            
            
            
        
    
                7:56 p.m.
            
        Hi Jean-Francois, I have seen this error reported, but only very rarely (maybe once a year at most). Is there any chance you can tell me how to reproduce it? --Eric Eric Pettersen UCSF Computer Graphics Lab http://www.cgl.ucsf.edu