I'm using Adobe CS5.5, but the Project Manager isn't entirely stable.It's been infamous for the An unknown error occured during the Project Manager operation. Please save your project and retry the operation". error message result.
Did this get fixed in CS6?
I'm running Windows 7 Ultimate (64-bit) on Dell Precision, 12Gb RAM. I submitted a bug report to Adobe.
Most of my footage is .mpg, .m2t, .mp3, .wav, maybe a few .JPGs.