Ok, we've put the title back to "Show HN: Adblock Fast" and restored the post.
The logs turned out to be more complicated than I thought. You submitted "Show HN: A preview of our iOS 9 ad blocker". That did break the rules—a "preview" can't be a Show HN when the "preview" is an email signup and an image. A moderator changed that to "Adblock Fast", and then a moderator changed it to "Show HN: Adblock Fast – An iOS 9 ad blocker".
Since you do have new things for people to try out, though, it seems like making the title more general is the best solution.