The pages I have tried above 9000000 works and below that number doesn't.
Frustrating when using Google to search for HN articles!
Sorry for the inconvenience! We've turned everything back on for the time being.
Our interim solution will probably be to cache the html for old articles, since nothing about old threads ever changes. This is not a perfect solution because, for those older articles, logged-in users won't see their usernames in the top right, nor will they see which items they voted for or the orange asterisk beside their own posts. But everything else should be there. Edit: oh, and those of you with a custom top color won't see that (on older items) either. :(
We have a better solution in mind that will restore the per-logged-in account details to the old threads, but that will take longer.
I'm impressed it runs off a single core it's a very popular site!