It may be the new Dashboard. It was published for Confluence 5.9 Server on 24th Nov 2015 (see all details here) - So Atlassian is probably upgrading it on all Cloud instances too.
Nic is right: If you had a custom dashboard (the dashboard can be redirected to the home page of a space), you can just use his link to restore the setting.
Hi my Community friends! For those who don't know me, I'm a product marketer on the Confluence Cloud team - nice to meet you! For those of you who do, you know that I've been all up in your Co...
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