LOL just my post! I just returned from vacation and I had posted something before reading the new posts in the thread.

I will try and see if I can duplicate your results with my MX-900. I have a similar problem where sometimes a button press fails but its not on the LCDs and its not on macros either. I had assumed it was my aim (I'm using IR) or not pressing the button hard enough.

I must admit to not liking the buttons on the MX-900. The rocker is ridged and hard on the thumb, also the buttons are somewhat hard to press and mushy which means that the feel is not positive.