[nfd]

It may not be a matter of the release being particularly special; rather, they might've been tipped off to some insider information or otherwise be aware of some information they felt it'd be best not to describe in detail right now.

[kanzure]

Unfortunately, none of the Bitcoin developers are currently aware of any "insider info" at all. This was force-pushed by a single individual who has not been communicating with anyone about this alert.