Hi,
It looks like there may have been a number of changes, supposedly to improve functionality. It looks like MS might be trying to get a hold on internet browsing once again, for the first time maybe in 10 years.
One of the things changed was supposed to be the max number of tabs allowed per page, which was 10 in MSE 10 and was bumped up to 100 in MSE 11 with special viewing added with that.
Supposedly faster with Java script.
We'll see MS if you can do it this time, and hold on to it for more then 2 months.
Everything MS says is "critical", but if it was so critical then why wasnt it already here.