automatic scaling to paper size?

[pls]

Hey all,

in http://code.google.com/p/lilypond/issues/detail?id=3023 I wrote:
I'm not too sure what "Automatic scaling to paper size"  means 
(http://lilypond.org/doc/v2.17/Documentation/notation/paper-size-and-automatic-scaling).
  Does it mean that only some \paper variables are scaled to the new size or is 
the function supposed to scale up/down the staff size / note symbols and titles 
as well?
I tried to scale down 
https://www.dropbox.com/s/ioo4waiconj443v/04-GoTellItOnTheMountain.ly via the 
command line (LilyPond v2.17.8):

$ lilypond -dpaper-size=\"a6\" 04-GoTellItOnTheMountain.ly

This is the result: 
https://www.dropbox.com/s/p5ggncx853frp56/04-GoTellItOnTheMountain.pdf

The titles, the tagline and the staves / note symbols still seem to have the 
same size.  The staves weren't scaled down but rather cut in two.

I got the same result when I included one of the following commands directly in 
the .ly file:

#(set-default-paper-size "a6")

Here is another example: 
https://www.dropbox.com/s/waso6zxtp8dw2v9/JSB_BWV1047_1_pls.ly and here is the 
result of 

$lilypond -dpaper-size=\"a7\" JSB_BWV1047_1_pls.ly

https://www.dropbox.com/s/tsmnpcr03xbns9p/JSB_BWV1047_1_pls.pdf

Loads of collisions. The staff size is not scaled down to the paper size…

hth
patrick