Letter page length too long

[Michael Haynie]

Greetings:

I've noticed that Lilypond consistently produces pages that are roughly 
1/2 a line too long, with the result that my footer line is cut off.  
The distance from the point where the text is cut off to the bottom of 
the page is 1/2", the usual printer margin.  In version 2.2, I was able 
to change the page length (by hacking the driver script) so that the 
footer was left intact, but that option is apparently no longer viable. 
 So:

a) Has anyone else noticed this problem?
b) Is there a fix?

I'm working with 2.6.3 (2.6.4 changes make no mention of this issue), 
on Mac OS X.

tia.