在更新时关于device-mapper而无法安装的问题

提示信息：
:: Synchronizing package databases...
core is up to date
extra is up to date
community is up to date
:: Starting full system upgrade...
resolving dependencies...
looking for inter-conflicts...

Targets (31): apr-1.3.9-1 db-4.8.24-1 apr-util-1.3.9-3 bluez-4.54-1
device-mapper-2.02.53-1 fakeroot-1.13.1-1 python-2.6.3-2
gdb-7.0-2 gnome-mplayer-0.9.8-2 gpm-1.20.6-3 perl-5.10.1-3
groff-1.20.1-3 vim-7.2.266-1 gvim-7.2.266-2 heimdal-1.2.1-7
hunspell-1.2.8-2 kernel26-firmware-2.6.31-1
module-init-tools-3.10-2 kernel26-2.6.31.3-1 libical-0.44-1
libmysqlclient-5.1.39-1 libsasl-2.1.23-2 lvm2-2.02.53-1
man-pages-3.23-1 pam-1.0.4-2 perl-locale-gettext-1.05-5
sdparm-1.04-1 subversion-1.6.5-5 taglib-1.6-1 tzdata-2009n-1
wget-1.12-1

Total Download Size: 0.00 MB
Total Installed Size: 381.42 MB

Proceed with installation? [Y/n] y
checking package integrity...
error: failed to commit transaction (invalid or corrupted package)
device-mapper-2.02.53-1-i686.pkg.tar.gz is invalid or corrupted
Errors occurred, no packages were upgraded.

上次没下载好吧。。