I'm trying to rename some of my jobs. So I go to the job configuration screen, change the name, scroll to the bottom and hit Save, and nothing happens.

Chrome shows a red line in the debug console saying the request was "(canceled)", although it was certainly not canceled by me.

Copying request headers or response headers from there seems to show no useful information either:

POST http://[fe80::6d02:b73:b100:d2cc]:8080/job/commit-trigger-4.0/configSubmit HTTP/1.1
(newline here)

I tried to get around this by disabling JavaScript, which seems to break Jenkins quite severely so I'll raise a separate ticket about that.

The actual version this is reported against should be 1.466. I can see that 1.476 is available but "Or Upgrade Automatically" is not working either, so it's hard to upgrade.

Funnily enough, the Save button on "Configure System" appears to work fine.