If you are working on a page in a particular working copy, and one of your colleagues edits the same page in a different working copy and publishes it, it's just a matter of time for you to have to deal with intermediate changes to the same content.
Scrivito indicates conflicting changes to content by means of notifications in the corresponding sidebar section.
In case a conflict exists, the page menu includes an item for overriding the changes that were published in the meantime.
What's going on here?