The search engine explicitly covers words in every message body... but not the titles which tend to be the strings best suited for summarizing a message's body. Countless times I've known almost precisely the title of the thread I want to bring up, but obviously don't remember the wording of it. (Or else I wouldn't need to bring it up, right?) Therefor this:

Add a function to the search engine which tells it to go through titles. Please. ^_^