On Sun, Jul 12, 2009 at 1:58 PM, Aryeh GregorSimetrical+wikilist@gmail.com wrote:
I've discovered that changing the doctype does actually cause some slight rendering differences. I don't think this will be a big delay, but I've disabled HTML 5 doctypes by default (in r53137) until I can figure out the issue and resolve it.
Issue fixed in r53141, and $wgHtml5 re-enabled by default in r53142. However, it turns out browsers don't treat the doctypes *exactly* the same, only *almost* exactly (as that issue demonstrated). The HTML 5 doctype triggers slightly more standards-compliant behavior for recent major browsers in some details of CSS -- which is ultimately good, but we need to be on the lookout for anything it breaks. This page has more info on doctype switches in browsers: