User blog comment:DaNASCAT/Technical Update: February 24, 2015/@comment-23989026-20150225155534/@comment-126761-20150225192202

Unfortuately, it's not always possible to give a lengthy notice of a change - for example, we wouldn't have been able to mention this in last week's notes because the change hadn't been coded at that point.

We do try and get these technical update posts out almost a day out before the release though, to give some forewarning of various incoming fixes and tweaks (the only thing we generally miss out are security fixes, since forewarning those fixes would be silly).