Hi there,
While connected yesterday to a machine running Mac OS X 10.8.2 from my box running Windows 7 Pro x64, I found the need to copy text to the clipboard. From Safari on the Mac, I would highlight a serial number in Adobe's online portal, right click it and hit copy, and my VNC session would immediatly freeze. I could still see everything, but I couldn't control the desktop at all until I disconnected and reconnected. Upon reconnecting I was able to paste the text into the Adobe installers just fine. I installed four Adobe products this way and the VNC session froze each time I copied the text.
Any ideas?