About the rate of the updates - fantastic. The responses to the people's complaints and issues are being addressed very well and I don't see why anyone should have any problems with coming up and trying things out to give feedback to the developers. This is real customer service and support.

Besides the 'no blinking' z axis rotation thing, probably the next thing to note is the conversations 'rearranging text to fit into portrait' because now when it's in portrait, the conversations are still orientated landscaped-wise.

A suggestion also: probably the task switcher can be made portrait if a single column task switcher is used? then vertical scrolling becomes more sound right? so, maybe when the single column task switcher is toggled on, then it is possible for the user to experience a portrait task switcher too. Of course this is IF getting the default or double column task switcher to go portrait is difficult instead of a single column one.

Hope these suggestions help