Microsoft has shipped Excel 2010 service pack 2 today.
This info is to tell everyone that xlsgen has been tested against Excel 2010 service pack 2 and the results are that file generation (XLS and XLSX) is working all well. In other words, after service pack 2 is installed, Excel 2010 won't pop up some weird error messages when it opens files created or updated by xlsgen 3.0.
The latest version of xlsgen 3.0 has been tested, 3.0.0.127
The above may not be true with older releases of xlsgen, 2.9.0.x, 2.5.0.x, ...