ok, so you are running an old version. the latest version now is 10.2010.19-1.003.

Connect to the internet, go to app manager, tap on update, and when the list comes up you should an entry called Maemo 5. this is the firware update. Tap on it and it will walk you through the process (nothing much you need to do except format and wait for it to download and install). your phone might become unresponsive during the process, this is normal, and remember to have the charger connected at all times while upgrading.

If the upgrade is successful, your version should show 10.2010.19-1.003.

BK