thanks for letting me know.

Preview 11 and Preview 12 do only differ in a couple lines of code 
that re-add the detection for PowerPoint (and possible other Carbon 
apps that store their bundle info in an undocumented manner). I 
thought this fix was important enough for many users to qualify for a 
quick update. All other code, including that regarding the Wii 
remote, has gone unchanged, though.

One thing you shouldn't do though is to enable and disable Bluetooth 
while Remote Buddy is running. I've had Bluetooth turned off myself 
most of the time - and re-enabling it only seconds before launching 
Remote Buddy does seem to have a negative effect on the pairing 
process. OS X seems to need some time to put Bluetooth back into 
operation.

I hope to remind myself on buying a Bluetooth stick on Thursday, so I 
can debug any timing issues with my slowest Mac (iBook G3).

Best regards, 
Felix