Well, I tried a fresh install (I purge the oolite package and all its dependencies) of the unstable version and it worked.
Unfortunately I don't know what exactly produce the error, but at least this solution worked for me. Thanks for all. Ernesto -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org