If I paste the position [0,0] to a Wx::Dialog the frame doesn't appear in the top left corner, it goes to the center!
 
  my $dialog = Wx::Dialog->new( undef, -1, 'test' , [0,0] , [-1,-1] );
  $dialog->ShowModal ;
 
The solution that I found is to paste the position [1,1] , but this isn't [0,0], the frame stay 1px to the left and 1px down! (Make a PrintScreen and zoom to see)
 
Maybe wxPerl thinks that [0,0] is equal than [-1,-1] ?! or this is a wxWindows error?! Because for Wx::Frame [0,0] works!
 
Regards,
Graciliano M. P.