[Shawn Simpson]

Capture does not equal separate. If you're speaking in pure HUI terms, I suppose it's possible that they mis-programmed that button and labeled it incorrectly, but in Pro Tools terms, Capture and Separate are different commands with different purposes. Just to be clear:

Capture region will take the selected area and create a region (which you will be prompted to name) in the regions list, leaving the selection and its parent region completely unchanged.

Separate region will do the same thing (but there's a preference to name automatically or not), except it will affect the edit in the playlist as well, making the selected area a region of its own, separate from its parent. If no area is selected (the cursor is blinking), separate region will simply make a split at the cursor's location.

I know it's off topic, just wanted to be sure everybody understood the two commands. HUI is a big mouse, so everything it does is also doable from the keyboard/mouse, except of course for the tactile faders. Have fun!!