AJAX saves fail on JIRA Cloud (comments, resolution)

Saving a comment in JIRA Cloud displays the loader animation forever (see attachment), though the comment is actually saved.

Similarly the issues Resolve screen won't save and this won't save for good, see JS errors in attachment. This is basically breaking large of JIRA functionality for us.

To add insult to injury the service desk at https://my.atlassian.com is down too.