hi, since today i have a problem with my n900 when i close the phone a little bit to hard, it crashes.... it doesnt do the normal shutting down process, it just off in less then a second everytime its happens i have to restart, when i close really gently i don't have a problem... anybody here who knows what i'm talking about an how i might be able to fix it, please help, i don't want to send it back to finland to have it repaired thanks in advance