thanks for your quick replies. i noticed that the errors are gone since the phone was rebooted. my device was flashed about a week ago. rootfs was mount rw, i thought about filesystem errors or bad blocks. since the last reboot everything is ok. i hope for a long time..

the outputs of what michaaa sugested:

~ $ df -h
Filesystem Size Used Available Use% Mounted on
rootfs 227.9M 145.3M 78.4M 65% /
ubi0:rootfs 227.9M 145.3M 78.4M 65% /
tmpfs 1.0M 76.0k 948.0k 7% /tmp
tmpfs 256.0k 92.0k 164.0k 36% /var/run
none 10.0M 72.0k 9.9M 1% /dev
tmpfs 64.0M 4.0k 64.0M 0% /dev/shm
/dev/mmcblk0p2 2.0G 282.9M 1.6G 15% /home
/home/opt 2.0G 282.9M 1.6G 15% /opt
/opt/pymaemo/usr/lib/python2.5
2.0G 282.9M 1.6G 15% /usr/lib/python2.5
/opt/pymaemo/usr/share/pyshared
2.0G 282.9M 1.6G 15% /usr/share/pyshared
/opt/pymaemo/usr/lib/pyshared
2.0G 282.9M 1.6G 15% /usr/lib/pyshared
/opt/pymaemo/usr/share/python-support
2.0G 282.9M 1.6G 15% /usr/share/python-support
/opt/pymaemo/usr/lib/python-support
2.0G 282.9M 1.6G 15% /usr/lib/python-support
/dev/mmcblk0p1 27.0G 874.2M 26.1G 3% /home/user/MyDocs


~ $ mount
rootfs on / type rootfs (rw)
ubi0:rootfs on / type ubifs (rw,bulk_read,no_chk_data_crc)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
tmpfs on /tmp type tmpfs (rw,noatime,size=1024k)
tmpfs on /var/run type tmpfs (rw,nosuid,noatime,size=256k,mode=755)
none on /dev type tmpfs (rw,noatime,size=10240k,mode=755)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,noatime,size=65536k)
/dev/mmcblk0p2 on /home type ext3 (rw,noatime,errors=continue,commit=1,data=writebac k)
/home/opt on /opt type none (bind)
nodev on /sys/kernel/debug type debugfs (0)
/opt/pymaemo/usr/lib/python2.5 on /usr/lib/python2.5 type bind (bind)
/opt/pymaemo/usr/share/pyshared on /usr/share/pyshared type bind (bind)
/opt/pymaemo/usr/lib/pyshared on /usr/lib/pyshared type bind (bind)
/opt/pymaemo/usr/share/python-support on /usr/share/python-support type bind (bind)
/opt/pymaemo/usr/lib/python-support on /usr/lib/python-support type bind (bind)
/dev/mmcblk0p1 on /home/user/MyDocs type vfat (rw,noauto,nodev,noexec,nosuid,noatime,nodiratime, utf8,uid=29999,shortname=mixed,dmask=000,fmask=013 3,rodir)


dpkg --configure -a as root has no output.