I bought Camptune, expanded the Bootcamp partition from 30GB to 40GB. Bootcamp now shows as 40GB in Finder. Disk Utility shows it as NTFS. When I boot into Windows it displays several screens of data and then dumps me to a grub prompt. Disk Utility on the Bootcamp partition stops at the "Syncing ..." prompt and hangs. Can anyone talk me through a repair of the MBR (or whatever)?