From the watchlist or history, visit the diff of a change made by an IP editor – when you click on the IP, you're taken to the IP user page, and since most IP editors haven't created a user page, you're thrown into the editor and told to create the page.
Expected: the link should take you to the contributions of the IP.
Version: unspecified
Severity: major
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=56814