I know this is unlikely to get the response I want but ---
As I go testing the outer edges of the Search function, I am coming across forums posts telling me that the Search failed because search argument structure X is known to not work. Unfortunately, as I run across these posts, I have no way to telling if the problem has been resolved. Setting up a test case, finding a test case, or giving up on getting a good test case, then running the search to see if it is still a problem is a temporary, frustrating, stop gap solution.
Would it be possible to get a list of the problem reports on the search for correct syntax but incorrect or absent results? Then when I hit a problem, I can check if it is the fault of the search engine or me.