thanks for the file.

I've been at Mac Live Expo since Wednesday and had to intensily 
prepare before that. So I could only have a look right now.

I've found an anomaly inside the log. There are two user clients 
attached to your USB device. In this case, each user client does 
represent a different application accessing the USB device from user 
space. Or said differently: it looks like two applications are trying 
to access the Keyspan IR receiver at the same time with the two 
possibly entering a race condition that prevents the device from ever 
successfully initialising.

Do you use - or did you use - any other software that contains drivers 
for the Keyspan receiver?

If so, did you completely uninstall it by completely deleting it?

Could you make sure Remote Buddy doesn't get started on system 
startup, then rebooting (or whatever would lead to the problem), then 
- without Remote Buddy running - make another ioreg dump and send it 
over to me?

Thanks in advance!

Best regards, 
Felix