Problem Solved.
Till now I have time to try a fix to segmentation fault was very easy in my case execute:
aptitude reinstall mp-fremantle-community-pr
Des:1 http://maemo.merlin1991.at fremantle/free mp-fremantle-community-pr 21.2011.38-1Tmaemo11+thumb0 [8118B]
Descargados 8118B en 1s (4724B/s).
(Reading database ... 71536 files and directories currently installed.)
Preparing to replace mp-fremantle-community-pr 21.2011.38-1Tmaemo11+thumb0 (using .../mp-fremantle-community-pr_21.2011.38-1Tmaemo11+thumb0_all.deb) ...
Unpacking replacement mp-fremantle-community-pr ...
Setting up mp-fremantle-community-pr (21.2011.38-1Tmaemo11+thumb0) ...
Reading package lists... Done

And no problems reported
and in setting about product :
Nokia N900
Maemo 5
Version: 21.2011.38-1