letter module: no linebreak in signature

[Michael Green <merely.ridiculous@gmail.com>]

Using Wolfgang Schuster's wonderful letter module, I enter my  
signature with my name and title like so:

\setupletter[signature={Michael Green \\ Assistant Professor of  
Philosophy}]

This used to produce a line break between "Green" and "Assistant" so  
the output would look like this:

Michael Green
Assistant Professor of Philosophy

But it no longer does. Now it comes out like this:

Michael Green  Assistant Professor of Philosophy

Is there a preferred way to accomplish the effect I want?

Thanks!

Michael

----------  Example  --------------------------------

ConTeXt  ver: 2008.11.10 21:40 MKIV  fmt: 2008.11.17  int: english/ 
english

\setuppapersize[letter][letter]

\usemodule[letter][style=semiblock]
\setupletter[%
  closing={Sincerely yours,},
  signature={Michael Green \\ Assistant Professor of Philosophy},
  date=\currentdate
]

\setupletter[%
  opening={To the Addressee,},
]

\starttext

\startletter

Here is the content of the letter.
\stopletter
\stoptext

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