I ran the rebuildall.php script from the command line. When it rebuilt the recent changes table, it created several "log" entries for actions that would not normally show in recent changes.
For example, it added several "Patrol Log" entries, which are normally suppressed. In addition, my wiki has two custom logs that I use, and do NOT normally show on RC. These entries also showed in RC after I ran rebuildall.php
Version: 1.20.x
Severity: minor
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=18364