We were deleting old page revisions twice, and the first time it didn't matter if we had more than 10.
Backwards compatibility issue: Fields that were previously using Array field type will be converted to new Matrix type but will lose their display titles until saved again. Done because destructive edits to actual data can be bad. Settings are, however, updated.
Presets stuff.
Downloading an update file should only be accessible to developers.
Merge branch '4.1-devel' into 4.2-devel