I was just tolerating toolset, every time I started it up, it would cry about registry keys being missing, advising me to run the updater to rebuild them.
I ended up having to do it manually, because the updater didn't seem to be able to access/update my registry.
Once I added the registry keys (I suspect it was the GUID one)
Suddenly ctrl + c and ctrl + v worked like a charm.
I remember hearing a while back that the registry has a GUID entry for most/all applications - and I suspect it uses that GUID entry for saving contextual clipboard information.
After all - A Placeable is going to be useless to Microsoft Word etc.
So without the GUID entry, it had no way of saving/retrieving via the ctrl+c / ctrl+v shortcuts.
It was most likely trapping the keystrokes, and sending the data to nowhere land.