I posted this in another thread and didn't get a response, so I'll try here. According the blog and manual, "Use the cursor keys (up/down/left/right) to move effortlessly throughout the audition regions.  When you hear something you like, press the enter key to choose it." 
Sounds like a cool thing, however, when I try it, the arrow keys move between different tracks and/or tracks/buss, not the different takes in the comp lanes, what am I doing wrong? Thanks.
 

Make sure you have expanded the track to show the Take Lanes;
Make sure you see the new "comp" mouse cursor, swipe clips to break them up if required;
select clip 1 in take lane 1
press Shift-Spacebar
use arrow keys - they should move the "focus" around the clips in the take lanes

did all the above, still not working.

Are you clicking in the very fist clip to give it focus? If not the track headers will respond. As stickman said make sure you start playback as well, either shift + spacebar for clip looping mode and using the cursor keys to navigate.
 
If you use regular playback start you can click in a clip to audition it from clip start but the arrow keys method won't work.

Found the answer I think. You have to click on the bottom of the clip to make it work.