legend whitespace offset

Hi I discovered that when I plot many (e.g. 20) data sets

    > in one plot and request a normal boxed legend the
    > whitespace between the lower and upper box bounds and the
    > firet and last legend entries increases with the number of
    > data sets (i.e. legend entries). Is there a way to make
    > this whitespace offset independent from the length of the
    > legend?

Not currently, though it is a good idea. Right now you can control
the legend "pad" which is the fractional whitespace inside the legend
border. So you should be able to tweak this parameter in the final
output to get something that looks about right, but having this in
points rather than in relative coords makes more sense ultimately.