Hi,
It saw it three times now. After editing a page, all links (referring to other pages or users) within the page was replaced by the same link which was to the saved page (itself!). The following is a snapshot of the received email that display the one of the changes. These usernames were replaced automatically after clicking on the save button. And that's the same for all other link in this page, i.e. all replaced by a link to the page that was edited.

Setup: Confluence 6.0.3, Postgres 9.5.6
This is an important issue since you are not sure if you page will be automatically corrupted after a page save. Did not find any related subject so far.
Regards,
Guillaume