Bert,
I think it has to do with hick-ups - the event playback is sensitive to other activity on the machine, it seems it looses events in that case. After rebooting it worked fine.
Building RPMs now, sorry for the false alarm ...
Phew! But, it can happen in the real environment, so it is not very false at the same time. Bad timing, but good reminder of it...
-- Yoshiki