It seems that the new I.R. remote protocol is more sensitive than the older one. The new I.R. protocol works on Motorola DCH, DCX, Comcast branded "RNG", and DTA set top boxes. With the Motorola DCH and DCX, they are still backwards compatable with the older remote protocol.
The dark grey Comcast remote is programmed with the new protocol, and the lighter grey Comcast remote is programmed with the old protocol. I have a DCX-3400 320GB DVR that is supposed to come with a dark grey remote. However the local Comcast center gave me a brand new light grey remote. It works just fine without any issue.
The RNG-110 is manufactured by Pace. It run's I-Guide, but it has the ability to keep the on screen graphics stretched to fill the screen even when on a 720p or 1080i channel. All other HD boxes center the on screen graphics in a 4:3 mode on top of 720p or 1080i content. This means the screen saver function actually WORKS and protects the side 'pillar' area's when outputting an HD video mode.
The RNG-110 has a pretty neat diagnostics dashboard. To get to it, power off the RNG-110 and quickly push the OK/Select button on the remote. If you do that fast enough you will see a blue screen with colorful indicators regarding the signal levels (Green for good, yellow for marginal, red for bad). You can read the on screen instructions to get out of the "Dashboard" and into a big menu full of diagnostic options.
The RNG-110 runs much cooler than the standard Motorola set tops. It has a cable card slot in the left side, and from the top vents you can see the Motorola M-Card inserted inside. This is not user serviceable, it comes with the card by federal mandate that was put into effect on July 2007. The RNG-110 has USB, Firewire, Ethernet, IR, HDMI, Component and Composite ports on it. It's a pretty neat little box. Remarkably small considering it does full HD. They've come a long way since those huge pizza box sized Motorola HD boxes.
You can also fine tune the output resolutions. Power off the box and push menu on the remote. The last channel will come back on the screen along with an overlay box in the upper right corner. You can turn on or off individual resolutions. I usually select YES for all resolutions that the TV is capable of. Selectable options are 1080 passthrough, 1080i, 720p, 480p, 480i. There is also a setting for closed captions and TV aspect Ratio (4:3 or 16:9).