Movable Type, the aging blog software made by San Francisco startup Six Apart, may be set to release a new 4.0 version on Tuesday. Barely. Which is bad, considering that Movable Type is still the company's cash cow. Byrne Reese, its product manager, accidentally forwarded an internal planning memo to an outside developers' mailing list. Reese says the memo, meant to help management decide on Monday whether or not the product is ready, is "intentionally pessimistic." But it has a laundry list of unresolved bugs. And Reese admits that some of the bugs will "dramatically slow" adoption of the new version. Despite that, he thinks the company can "manage" a release. And by manage, he means spin like a top: "We will need to be on our toes in regards to communication and PR to stay ahead of the curve with people who will say that we rushed the release." Here's a radical notion, for a blog-software company that claims to be about transparency: Why not just admit you did, in fact, rush the release? The full memo, after the jump: