more(1) has gotten more demanding?

I recently saw this on the serial console for a box:

cyrus# ps ax | more
WARNING: terminal is not fully functional
-  (press RETURN)

more(1) now seems to want me to acknowledge the inadequacy of my serial 
console every time I view any file.  I'm sure it didn't always do this, and to 
be honest, I would rather it continued to not do this very time I view a file 
or man page.  Or for every patch applied by mergemaster.

Robert N M Watson
Computer Laboratory
University of Cambridge