My guess is they parsed the code for text references to layers and replaced it with lanes. The key bindings are orphaned until they find a way to implement the function with Lanes.
 
I for one was not fond of the willy-nilly nature of the rebuild layers function. However, a remove empty lanes would be nice.

Tom Riggs
I for one was not fond of the willy-nilly nature of the rebuild layers function. However, a remove empty lanes would be nice.

Would have to agree with this.

bapu
To Be Announced

So when are you going to tell me what TBA means?

SteveStrummerUK
 

Bristol_Jonesey
I thought it was the Tenpin Bowling Association
 
Just spare me from any sort of Team Building Activities

 
I'm guessing Paintball isn't your thing then Col
 
 

Not in this weather Steve

Titillating (key)Binding Anticipation?