As the 6.70 gone live in the public with a massive number of changes and ultra balancing. There is a quite a big chance of bugs & errors in this current release. So, Dota 6.70b is going to be released soon as a bug fix patch.
Update: The DotA 6.70b is now released.
It will fix all the DotA 6.70 bug & errors that were detected and reported by the Dota community. We hope Dota 6.70b Map will be the final version of Dota 6.70 series and so IceFrog should concentrate on the next Dota 2 and DotA 6.71 series.