I haven't been able to produce a reliable test case, but I have noticed that fairly often, I try to search for a story or comment that I <i>know</i> exists, that I distinctly remember seeing in the past, and I won't be able to find it. Then randomly, perhaps after reposting said article, I'll try again later, with the exact same search terms, and it will show up in the results. Then a few days later, I look it up again, and it doesn't show up anymore.<p>I'm sorry that that isn't a terribly helpful bug report, but I think you have a frustrating bug in your backend somewhere.<p>A more concrete issue present in both the old UI and the new one would be that there is some kind of problem with your search form such that, on iOS Safari, the multiple forms control with the little arrows to select between fields pops up, even though there is only one field. This means you cannot see the search results while you are typing, when you would otherwise be able to see at least the title of the first result. Also, hitting "Go" (or now "return") doesn't make the input control go away, you have to hit the X next to the field select arrows to view the results, which manages to trip me up every time. I'm not a web guy though, so I don't know if that last one is inevitable for this kind of form or something.