This needs to be fixed, or you're going to lose users like me.
I only use this search engine because I can configure it to give the best results quickly.
That's my only real concern.
You appear to have fixed the issue with soprano and sopranino being considered synonyms, which is completely incorrect, but I'm sure my concern is held by enough users that many will switch as soon as there's a viable alternative.
Also, this means that you are deliberately influencing search results to advantage certain parties.
When choosing my search engine, I couldn't care less how easy it is to turn verbatim on if it can be set to on by default on another engine.
