The instant paste feature has finally landed into the Diodon trunk. With this feature there is now no need to press Ctrl+V after choosing a clipboard item (which you wanted to paste anyway ;))
Diodon does this now for you…

However, before this change gets released it needs intensive testing. And, of course, I want to hear your comments on what you think.

Before you go ahead please remember that this code is in development state and therefore should not be used on a production system:

So let’s start with the installation by running following commands:
sudo add-apt-repository ppa:diodon-team/daily
sudo apt-get update
sudo apt-get install diodon

Close Diodon and open it again. The instant paste feature should now be activated. Set the cursor at the position you want to paste, choose an item from the clipboard history and see how it works (hopefully anyway ;))

Note that currently the instant paste feature only works for applications which do not ignore events of X (see here for details) and use
Ctrl+V to paste content.

Please file a bug when you find an application where the instant paste does not work.