In both Firefox and Chromium, I'm getting an endless loading indicator (5 minutes and counting), for attempts to post or edit any content, at Enwiki and mediawiki.org
(There are no problems at Frwp, Cawp, Ruwp, across which I have a mixture of sticky-preferences for default editor-mode, so it's not related to that.)
It only became a problem roughly 30 mins ago (5pm PDT).
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