Sometime between yesterday and today, the edit summary field on en.wp's edit page lost its "type=text" attribute. It now reads:
<input name="wpSummary" size="60" value="" id="wpSummary" maxlength="200" tabindex="1" />
Lo and behold, type=text is the default, so it doesn't actually break a standards-compliant browser, but it's kind of an an odd change. (I noticed because it mildly broke a bot of mine, that assumed type=text only by accident, and after printing some extraneous error messages.)