Okay, I don't know if this is "new", but if it was always there I've never noticed it before... in the post search results, there was a column "Score". In the "get all posts by member" where I noticed it, all of the "Score"s were 0. What is this? (I looked to see if there had been a voting mechanism added for some reason but that didn't seem to be the case... )

When you do a search by keyword, the search engine will attribute to each post a score based on how relevent said post is to your query. The value is determined automatically, and the results are ordered based on that.

In the case of browsing through a member's post, there's no keyword so the score is always 0.