I faced issue when tried to drag drop / copy paste on Ubuntu 14 guest copied from another machine on Windows 8.1 Guest VMware Workstation 10.0.1 build-1379776
I was able to fix the issue after doing the following steps
Go into VM / Settings / Options / Guest Isolation
UNCHECK both checkboxes (Enable drag and drop, Enable copy and paste) and click OK.
Shut down guest
Reboot the host computer
Run VMware Workstation
Before running guest
Go into VM / Settings / Options / Guest Isolation for the guest, and CHECK both checkboxes
Power On the guest.
Issues is fixed Enjoy!