ImpressCMS is getting ready to release version 1.3.9 to the world. As a precursor, the release candidate will be available before the end of the week.
The packages are being made manually at the moment, that's what takes a bit more time than previously. We haven't had the opportunity to reconfigure the build infrastructure to take into account the switch to github and to Git.
However, instead of waiting for that to be finalised, we'd rather give you the new version as soon as possible, so this was the compromise we had to make : longer production timeof the package, but you get the release sooner.
Keep watching this space for more info.