Also for me , compared to 1.02 , v1.03 is slow. Heatsink inside my laptop (xpsp3 intel centrino 1.8ghz 2gb-ram) goes like a boeing 777! :-)
But data on my disks was never going losed also on the workstation (vista x64 i8500 4gb-ram sata raid0) where the speed difference is not so high.
But always data at the end of disk and free spaces inside data.