Apologies for putting this issue on Bitbucket, but

1. I can currently login to my Bitbucket account
2. I cannot currently login to my Atlassian account
3. I cannot raise a ticket on Atlassian without ... logging in.

so please forward if necessary. The login problem I'm experiencing, from at least 23:00 UTC 9 Jul 2016 until now (~= 00:30 UTC 10 Jul 2016) is

1. I goto http://my.atlassian.com/ to login
2. I get forwarded to the login page https://id.atlassian.com/login?application=mac&continue=https://my.atlassian.com
3. I enter my credentials, then click button='Log in'
4. I get a page with the same URI as above, containing only the following text:

Invalid CSRF token found in form body

Please help!