- There should be an option $conf['requiresums'] defaulting to false.
If you make changes and do not enter a summary, the summary field
gets a red background already to hint the user at entering a summary.
I like this subtle behavior.
- With $conf['requiresums'] set to true, in the case of an emty
summary or check the minor edit checkbox.
- Minor edits should not be included in the feed.
- On the recent changes page all edits should be visible, minor edits
with a special icon, a grayed out link or some other visual effect to
distinguish them easily.
By the way: I just looked at how it is done in MediaWiki and I
noticed that the section title is entered automatically into the
summary field if you edit a section. That could be useful for us too,
don't you think?