must send modifications license acceptable?

[Rahul Sundaram]

Patrice Dumas wrote:
> On Sun, Aug 26, 2007 at 02:50:50AM +0530, Rahul Sundaram wrote:
>> Any license that mandates a requirement to send all modifications to the 
>> original authors is clearly non-free.  Academic Free License does not do 
>> that. The other licenses you quotes appear to do this.
> 
> In fact in one of the license this is a should and not a must, Karl
> Berry (texlive maintainer) thinks it is right and I agree with him:
> 
> "All modified versions should be reported back to the author."

If I make private modifications in Free software and don't distribute 
the software, I am under no obligation to distribute any changes to 
anyone.  Maybe this request can be presented outside the license and 
that's what the DSFG FAQ suggests

http://people.debian.org/~bap/dfsg-faq.html

Rahul