Thank you for posting that. The discussion is very interesting and clearly explains why the scrollbar was moved. No rational was given for changing the shape of the tabs however.
Comment 29 by Tomaz Vajngerl: I have also made some visual changes to the tabs (rectangular, more plain look)...
That change has no purpose, why was it made? To put another nail in the coffin of skeuomorphic design? (Rhetorical, don't waste your time trying to answer.) Visual cues are important and I think the rectangular tabs suggest columns rather than overlapping worksheets. Sorry, that's just my opinion.
"A new building on our campus opened last year and featured many modern technologies, including very nice-looking glass doors through which you enter and exit the building. The problem is that the doors have identical handles on either side. The handles themselves are very attractive, but they don’t tell me what to do when I want to enter the building—should I push or pull the door? The handles on these particular doors suggest to me that they are made for grasping and pulling. However, the door goes in only one direction, and the very same handles appear on both sides of the door. Therefore, to enter the building, I have to use the handle to pull the door, and to exit, I have to use the identical type of handle to push the door. How would someone possibly know which way the door swings when approaching it?"
Continued here: http://www.humankinetics.com/excerpts/excerpts/Push-or-Pull
On the positive side, I love the new icons on the tool bars especially the one for inserting a chart. Also, I've been using and promoting LO since the beginning. I started with Open Office some moons ago and when Oracle messed everything up I switched over to LO and love it. So, I apologize for the rant. (My wife says I'm getting old and grumpy. Maybe she's right.)
-Bill