I’ve gotten this error message twice now, after a more-than-5-minute wait between searches (New Posts). WTF?
My trackball occasionally triggers a double click when I only click once thus sending two search requests within a split second.
Huh, what do you know, now that you say that, I am noticing inadvertent double-clicks in other apps as well. Time for a new mouse, I guess. This one is getting elderly, after all.
My favorite: “Please try again in 1 second”.
Which is less than it took to serve that message and all it does is generate more work for the server. There is nothing that can be done against that, I know. It’s just funny.
I take a screenshot on these, I’m trying to collect the whole set. 
It’s worse than that. I believe it says: “Please try again in 1 seconds.” Plural!