This is interesting to me - because about a week ago (before the update came out), I noticed that my home screen would now work in landscape mode. I thought it odd I hadn't noticed it before.
Now, it doesn't do it.
I'm also one of those, who has the disappearing checking for software updates screen and has not gotten the update.
Two things - 1) I wonder whether I had something pushed to my phone that I wasn't aware of that was "testing" the landscape mode? Maybe?
2) To others who can't get the update, and are experiencing the disappearing box - did you ever notice last week that your homescreen would go to landscape mode?
Ah well, for now I'll enjoy the continued free MHS.