Before the upgrade,
1. I could press the Green button and it will open the Phone area to make the calls. Now i have to go to "place call". I'm talking about "make calls" when phone is locked option.
2. I could view Calendar entries in one single page(day view). After the upgrade the text size takes a lot more space. It's just too big, i hate it.
3. I could view a lot more contacts on single screen.
4. Besides the large micro sd card support, i don't see the reason to upgrade. After the upgrade browser feels slower.