ColdFusion does. There was a famous stackoverflow thread on that "We have an employee whose last name is Null. Our employee lookup application is killed when th

ColdFusion does. There was a famous stackoverflow thread on that "We have an employee whose last name is Null. Our employee lookup application is killed when that last name is used as the search term (which happens to be quite often now)" http://stackoverflow.com/questions/4456438/how-to-pass-null-a-real-surname-to-a-soap-web-service-in-actionscript-3 http://stackoverflow.com/questions/4456438/how-to-pass-null-...