[Structures_DataGrid] Problems with Linux / PHP4: Empty table

Hello everybody, I've been using DataGrid for over a month with great pleasure, specially the callback mechanism for handling column contents. I code on a Windows XP (PHP 5.1) test machine and then publish to a SuSE Linux production server (PHP 4.3.4), and had no problems in either system until last friday, when I upgraded the DataGrid package. The code works fine on the XP PHP5 machine, but does not on the SuSE PHP4. I tried with different DataGrid levels (0.6.0, 0.6.2 and latest CVS), and found the same problem: I get an empty table with 2 cells. I tried to run the supplied example.php in the server, with same (wrong) results. You can better see what I mean in http://80.35.122.64/test/Structures_DataGrid/Examples/example.php Any hints will be *much* appreciated. TIA, and kind regards - Daniel Garcia