I can second everything said about the new, fixed, batch.
I had a remote which suffered from the range issue and the left click issue which has now been replaced from the new batch and, as tetzuoshima said, it's all I hoped for when I originally ordered
The buttons are now responsive both physically and, as a result of the stronger signal, within XBMC. Range is now a total non-issue and it works from the room next to the one my media center lives in.
On a separate note my experience with Pulse Eight has been excellent. They've been polite, professional and customer friendly during all my direct correspondence with them. The replacement was sent by Pulse Eight without any need for chasing beyond the original RMA.
Basically, I really recommend the remote, it's a joy to use and my MCE remote has now been retired; Thanks Malard for making it available and sticking with it.