Page 48 of the memoir manual states this about using \DoubleSpacing:
The spacing in footnotes and floats (e.g., captions) is un- altered, which is usually required once the controllers see what a blanket double spacing brings.
The problem is that this is not working for me. When I compile several memoir style documents, there is no difference between \DoubleSpacing and \DoubleSpacing*. I would like to use double spacing as described in the manual (No double spaces in footnotes and floats). Any help?