Hi Niccolo, thank you for your help.
you can find the quick recipe I used to compile the package, I had to change some Debian files, as you can see.
I see! You have deleted the xterm-patch and modified the www-browser patch.It would be great to backport your changes to the official svn repository [1].
regards, Sebastian H. [1]: svn://svn.debian.org/pkg-grass/packages/grass/branches/6.3/debian