When I use the flex template html I cannot get my site to validate and the first thing is that the validator is looking an HTML Declaration. Why does the Flex html template just use <html lang="en"> . Am I better off using swfObject 2.0 to embed by Flex swf.
Actually, Flash Builder 4 is using swfobject to embed swf in html so it looks that it is recommended. In Flex Builder 3 you can always make your custom index.template.html file with correct html validation and swfobject.