this looks strange, are you sure you don't have a space issue?
Nokia-N900-51-1:~/.cache/syncevolution$ df Filesystem 1k-blocks Used Available Use% Mounted on rootfs 233344 171608 57456 75% / ubi0:rootfs 233344 171608 57456 75% / tmpfs 1024 68 956 7% /tmp tmpfs 256 80 176 31% /var/run none 10240 80 10160 1% /dev tmpfs 65536 4 65532 0% /dev/shm /dev/mmcblk0p2 2064208 789048 1170304 40% /home /opt/pymaemo/usr/lib/python2.5 2064208 789048 1170304 40% /usr/lib/python2.5 /opt/pymaemo/usr/share/pyshared 2064208 789048 1170304 40% /usr/share/pyshared /opt/pymaemo/usr/lib/pyshared 2064208 789048 1170304 40% /usr/lib/pyshared /opt/pymaemo/usr/share/python-support 2064208 789048 1170304 40% /usr/share/python-support /opt/pymaemo/usr/lib/python-support 2064208 789048 1170304 40% /usr/lib/python-support /dev/mmcblk0p1 28312128 736832 27575296 3% /home/user/MyDocs /dev/mmcblk1p1 248960 105056 143904 42% /media/mmc1
Nokia-N900-51-1:~/.cache/syncevolution$ du -hs 666.6M .