> GPL code is not free. This seems to be your
> problem, you believe it's free.

I belive that <in Rosen's words>

The GPL grants an unlimited right to make
copies but a conditional right to make
derivative works (with some other words in
the license about a limited right to make
a "work based on the Program"). The only
way a judge can interpret that license is
to determine whether what is being made --
your A+B, for example, where A is the GPL-
licensed work -- involves making a copy of
A or creating a derivative work of A. If
the former, then the license is clear that
there are no reciprocal obligations. If
the latter, then the license is also clear
that the author of A+B must disclose his
source code.

<unquote>

regards,
alexander.