The Pixiv index is once again up to date, or so it was a few hours ago when 15953992 was the max... Undoubtedly the index is already missing the most important and epic images ever, but what can ya do~ Next update in a few weeks, that's not too terribly long to wait. ;P
Oddly enough, the index gen completed before the display images finished uploading to the server, so some of them may be missing for a little while. I decided to deploy the new index before the upload finished since it will quickly resolve itself, and the search results will be accurate even with a few of the the display images missing.