I upgraded to Moutain Lion last week and also had to re-install Windows 7 as the OS did not recognize the partition as NTFS. I found the trick was to re-install Windows 7 using Boot Camp - reformatting the partition to NTFS part-way - and then restore the Windows 7 image using the back-up disk. This did then allow MLion to read the NTFS partition, but it now appears on the desktop as 'Untitled'. I've changed the name in Windows using the 'C' properties and rename options, using a number of 'colourful' drive-name variations which at the time reflected my increasing frustration (all limited to 8 characters might I add). However, none of these changed the way ML shows the 'Untitled' partition. Is there a bug or is there something else I need to do? Many thanks!