We are working to resolve issues in UDK that prevent folks from shipping. This mostly consists of crashes and system failures but can be extended to poorly-functioning features. In the case of this build, most of what’s fixed is iAD’s and assorted rotation issues.
Because what “prevents someone from shipping” varies from developer to developer, and the issue can be emotionally charged, we have decided not to “advertise” these builds, but rather contact the forum posters and contributors from the forums here: UDK Forums Update - UDK Content Creation and Design - Epic Developer Community Forums that call out the various issues, when we fix them.
Best to keep future UDK conversation to those forums. Hope this makes sense.