Thanks a million this fixed my problem of copying and pasting on New Gmail Compose. This is how you fix it in newer version of ubuntu.
It seems the option has disapeard in 13.10 so if you had it enabled before upgrade you will need to use dconf-editor and search for "locate-pointer" option and set it off. (org.gnome.setting-daemon.peripherals.mouse)
Now it works! thanks.
Thank you very much guys!! I've spent days to solve this problem, and this solution solved my ctrl+c problem in my windows guest. As sysadmin in putty window the lack of ctrl+c was a really painful lack. Thanks again guys!!
ubuntu 14.04 / linux mint 17 and I still need to do this... thanks for figuring this out years ago for us!
Thanks, the dconf-editor answer is the one I needed!