John Blackbourn sent me another bug fix, this time related to multisite installations. This isn’t a mandatory upgrade, unless you use multisite.

• It’s now possible to remove matches from the results with the external filter relevanssi_match. If the weight is set to 0, the match will be removed.
• Multisite installations had problems — installing plugin on a single site in network didn’t work. John Blackbourn found and fixed the bug, thanks!

The first change makes it possible to for example make a filter that’ll make the matches in post body lose all significance. See Making post body not count in Knowledge Base.