You are exactly right Steve - that is very close to what I am seeing and it is often quite hard to read. For example, where function prototypes are displayed on two lines, it takes me a lot longer to parse and understand them when compared with a situation where they are displayed on a single line. 

Although I agree with those who claim that there is an ideal line length for readability, I really don't think this can be predicted in advance since it is inevitably varies widely from one user to another.  So I remain convinced that it is better to use a design that dynamically adjusts to the width available.

    Brian