The clinic is busy as ever with more HTML5 ailments. This week, we’ll show you how (and whether) to store a <canvas> on the server, whether to use <progress> or <meter>, more on <header>, the placeholder attribute, and HTML5 minification.

HTML5 offers several useful new elements, to add further meaning to the markup of a page. These new elements include time, mark and here is another one, meter. It is an inline element so it can be used inside most elements, including a header or a paragraph. What does it say in the spec? The [...]