Some other people also posted screenshots with a drive map like yours (lots of small gradients). Maybe it'll be fixed in next release...
PS : Just how big is your drive ?
It is a Seagate 1500GB.
After I rebooted the second time, (it was running slower and slower, taking longer and longer before reading files from the drive) I let Windows 7 (64-bit) run a chkdisk - after which the disk became 'unreadable'.
Notice that I discovered the slowness BEFORE updating Defraggler - I tried a defragg to REPAIR the slowness.