I have used ubuntu fine without this issue. So not sure what is going on I just switched to Linux Mint 14 MATE. The reason is because Unity 2d is not available in latest version and I need fast remote desktop.
The issue when I hit Ctrl-C it Kills the remote desktop.
When i highlight something in XChat it kills the remote desktop.
I have to connect via ssh and reboot and all is working again.
If I am in an app and use right click and copy the session remains and is not killed.
I found an ubuntu thread that never received an answer as to what the problem would be.http://ubuntuforums.org/showthread.php?t=1415936
I am running Vino-Server. Everything else seems to be fine.