After reflashing my N900 and installing all the desired apps, I had about 73 MiB of space in the rootfs filesystem. About two months have passed and my rootfs space is slowly decreasing everyday, about 100 kiB or less per day. Now I have only 69.3 MiB. I think that there should be some logfiles that are growing inside my rootfs filesystem, or other data that the OS is not properly cleaning after every boot. Did you know about this behavior?