Service Pack 1 for Windows Server 2003 is the most comprehensive set of security enhancements ever delivered in a Windows service pack, according to Microsoft
http://chkpt.zdnet.com/chkpt/ukzdfeed/http://news.zdnet.co.uk/0,39020330,39193293,00.htm
http://chkpt.zdnet.com/chkpt/ukzdfeed/http://news.zdnet.co.uk/0,39020330,39193293,00.htm