Thanks for the reply and offer of help.

It's good to know that the automatic delay between IR commands can now be adjusted; I did find the general slowness of IR a little bit annoying with the SL.

I must admit though, it does still surprise me that transparent areas of a button react to being pressed - this isn't the way with Prontos, the itouch/pad/phone or even PDAs which the SL was supposed to be based on. It's not a deal breaker though.