This posting is older than 6 months and can contain outdated information.
The "parsing" of the remote control IR signals takes place directly in
the IR receiver hardware. Remote Buddy then reads the "parsed" data
and maps it to the respective actions. So, nothing should be different
between Leopard and Tiger as no system software other than rudimentary
USB I/O is involved in the process. I have no influence on how the
hardware IR receiver "parses" the IR signals, either.
Apple's Remotes use a non-standard IR protocol, so that it's likely
that the Harmony does not get the repeats right.
Best regards,
Felix