In the last few weeks I've gotten that message 3 times while posting. I can certainly understand the need to throttle things when there's too much activity for the server to deal with in a timely manner, but can't postings be handled a little differently? In two of the three cases, it only took a minute or two. In the third case after 3 or 4 minutes it still was giving that error and I just gave up because I had to leave. In a related matter, the "New Posts" link apparently presents its info as if a search were being done, and that means that quite often it won't work because "searching has been temporarily disabled" for similar reasons. But I can't imagine what "New Posts" does is really that CPU-intensive compared to multi-keyword searches, so it'd sure be nice if that "New Posts" could be excluded from throttling of searches.