On Fri, Aug 26, 2016 at 2:21 PM, Alan Third <alan@idiocy.org> wrote:
Presumably something somewhere is looking for a symbol and
really doesn’t like getting a string instead.

​Although experienced users will read the documentation for 
ns-control-modifier
​ and recognize that the value should​
 be a symbol, there is nothing specific that tells less experienced users that it must be a symbol and not a string.  An explicit addition of such language to appropriate ns- variables will eliminate any question.

Bob