Yes, I've suspected there's something not 100% right about it, though I've never been able to work out specifically what it's been doing wrong because the search does work... it just seems though as if there should be more entries there, but I can't put my finger on it.
Back here behind the control panels, there's two different search/index methods available - fulltext mysql, and fulltext native. We've tried both and the former is the better of the two both in terms of search results, size of database, and reliability. However, I don't see any configurability options associated with it though - do you happen to know anything about Fulltext MySQL config on phpBB3?UPDATE:
Oh wait... I think I've figured it out. It's case sensitive. Pretty lame, yes, but if you know, you can work around it (so thanks for helping me know!)