Exactly - but this issue should've been brought to a boil when MS Office didn't use the same API that the rest of us had to use back in the early 90s.
Lotus was always screaming about this problem WAY BACK and, while working at Lotus, I hacked a couple of undocumented UI things Office did to help some our UI teams keep up with the Microsofts.
So I'm well aware they don't play by the same rules but this browser nonsense is just that, nonsense.
It was a massive waste of time and money, didn't really change anything in the end.
None of the companies or people MS destroyed were compensated and the OS development still hasn't been severed from the APPS development!
I'm not impressed.
When Windows, Office (MS IE included here), MSN/Bing/Live and XBOX are all separate companies, then it'll get interesting.