Thanks for the feedbacks.

Since reflashing didn't help, I guess taking it to Nokia is the right solution.
BTW, my memory cards are already out...
Microfab - do you have this behavior over and over again, and you take out the battery each time ? Or did it solve the problem for good ?
And last thing - how do I make Nokia handle my problem ? I want someone to see my problem there, verify my serial number, and say to me "yes, just send it and we will handle it"...

Regards,
Shushu