cfheader and filenames with spaces

Some time ago I had a project which required file downloads using cfheader. I found that file names with spaces were being truncated by
some browsers. Recently I came across this blog entry by
Charlie Arehart from New Atlanta which provides the solution.

Instead of

<cfheader name="Content-Disposition" value="attachment; filename=a text file.txt">

use

<cfheader name="Content-Disposition" value='attachment; filename="a text file.txt"'>