I was hoping that the Adobe development team would have fixed this by now but it seems that they do not use their own products. At least, certainly not for standards compliant work. In a revisit to my original article on fixing the issue with CS4, here is an updated

One of the first things you learn about XHTML is lowercase. Everything is lowercase. Lowercase tags, lowercase attributes, lowercase, lowercase, lowercase... I guess it wasn’t obvious enough to the developers over at Adobe because Dreamweaver CS4 has this annoying habit of mix-casing all of the JavaScript event handlers. Thankfully,