Just a reminder of my other symptoms and findings :-
I have the same problem. XP Pro SP2.
It's not related to the type of target app: I get it everywhere, including Notepad.
Doesn't matter if I click the target app first.
Doesn't matter if I use the 'simulate keys' option.
It always overwrites the active clip (so a subsequent manual Ctrl+V always works).
Sometimes it works fine for a few pastes, maybe 3 or 4 in a row, but then it always reverts to failing to paste, maybe for 10 or 15 in a row. Testing into Notepad, with nothing else running, reliably repeats this experience.
I only have a few old versions downloaded: the last one I have which works (perfectly!) is Version: 1.16.0.1 (CRC-32: 7A4ED312). Just swapping the .exe between that version, and the latest, reliably toggles the bug on and off.










