1. Agreed with above posters, the new UI is rather annoying. Instead of giving the pie chart a tab of it own, let it have it's own window that you are able to open optionally, such as with the Drive Map Legend (hell, COMBINE it with that one).
2. It defrags mindblowingly slow. What happened to the blazing fast defrag algorithms from the previous release? Were they less efficient than initially thought?
EDIT: In case it means anything:
Celeron 2.2Ghz (<-- Old, but not the cause for the poor performance unless it's a coding error with Intel CPUs)
1.5GB DDR PC2700 RAM
40GB HDD
Radeon X1550 PCI