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"If you are using the vb profile, then when you hit F5 you will get a debug build, but if you hit build you will get a retail executable. The simplest way to get things working again is to go to delete the bin directory under the solution/project path and then hit F5 again."
"See Video for Everybody by Kroc Camen for a JavaScript-less way to use HTML5 video with graceful fallbacks for all browsers..."
"Modernizr is a small JavaScript library that detects the availability of native implementations for next-generation web technologies, i.e. features that stem from the HTML5 and CSS3 specifications..."