(I'm not sure yet whether I'll need a corresponding height, but I
suspect I won't.)
-David
-- 
L. David Baron                                <URL: http://dbaron.org/ >
           Technical Lead, Layout & CSS, Mozilla Corporation
Would it also make sense to use that parameter (instead of munging the parent 
reflow state's computed width) to address bug 360757 and bug 359903?
-Boris