If you hover mouse over your user name, then chose "your content" it returns an error. For at least a couple of days now.
Even at the best of times site searches would often return nothing the first time, then a plethora if you repeat, exactly the same search string. Usually the exact match (the title, word for word) was way down the list, lol. At least it was predictable. Yeah as often as not I'd just use Google. But yeah, another symptom of something awry.