Amazing plugin, but it'd be great if we could control the cache manually again, maybe as an advanced option?
Also, I'm curious about how the relatedness is computed, because it seems as if posts with the least information (title only, no body text, no tags, no categories, etc) have the highest ranking across the board. I'm basing this on my blog where I had a post with only a title that was the top ranked "related" post on nearly every other of my posts.
Which is why the manual cache update would be great - I added tags, and category data to that post so that there was more to go on when it computed its relatedness, but the cache still hasn't been updated. I even tried changing some YARPP settings, saving, then refreshing, but the calculation seemed to be the same.
Again, all this aside, great plugin!