Upgrade 1.740 -> 1.750, Space ist left on device, still I get "No space left on device"

root@v2:/usr/share/webmin# df -h
Filesystem Size Used Avail Use% Mounted on
rootfs 1.9G 384M 1.5G 22% /
udev 10M 0 10M 0% /dev
tmpfs 202M 284K 202M 1% /run
/dev/mapper/v2-root 1.9G 384M 1.5G 22% /
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 403M 0 403M 0% /run/shm
/dev/vda1 228M 20M 197M 10% /boot
/dev/mapper/v2-home 15G 6.1G 8.2G 43% /home
/dev/mapper/v2-tmp 1.9G 35M 1.8G 2% /tmp
/dev/mapper/v2-usr 1.9G 1.2G 640M 65% /usr
/dev/mapper/v2-var 1.9G 836M 988M 46% /var

root@v2:~# aptitude upgrade -y
The following packages will be upgraded:
webmin
1 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/26.2 MB of archives. After unpacking 315 kB will be used.
Reading changelogs… Done
(Reading database … 112462 files and directories currently installed.)
Preparing to replace webmin 1.740 (using …/archives/webmin_1.750_all.deb) …
Unpacking replacement webmin …
dpkg: error processing /var/cache/apt/archives/webmin_1.750_all.deb (–unpack):
unable to create /usr/share/webmin/backup-config/config.info.hu.dpkg-new' (while processing ./usr/share/webmin/backup-config/config.info.hu’): No space left on device
dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
Webmin install complete. You can now login to https://v2:10000/
as root with your root password, or as any user who can use sudo
to run commands as root.
Errors were encountered while processing:
/var/cache/apt/archives/webmin_1.750_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install. Trying to recover:

root@v2:~# aptitude upgrade -Z -y -s
The following packages will be upgraded:
webmin <+315 kB>
1 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/26.2 MB of archives. After unpacking 315 kB will be used.
Would download/install/remove packages.

I changed the tmp folder in the webmin config to a folder in /home/

Now I got the following message when I updated through webmin:

Downloading http://prdownloads.sourceforge.net/sourceforge/webadmin/webmin_1.750_all.deb (180 bytes) .. Downloading http://downloads.sourceforge.net/project/webadmin/webmin/1.750/webmin_1.750_all.deb (164 bytes) .. Downloading http://vorboss.dl.sourceforge.net/project/webadmin/webmin/1.750/webmin_1.750_all.deb (24.98 MB) .. Received 1024 bytes (0 %) Received 2.50 MB (10 %) Received 5 MB (20 %) Received 7.50 MB (30 %) Received 9.99 MB (40 %) Received 12.49 MB (50 %) Received 14.99 MB (60 %) Received 17.49 MB (70 %) Received 19.99 MB (80 %) Received 22.48 MB (90 %) Received 24.98 MB (100 %) .. download complete. No package signature verification done.

Running DPKG to upgrade Webmin … Please wait a minute until it is complete before continuing.

(Reading database … 112417 files and directories currently installed.)
Preparing to replace webmin 1.740 (using …/126567_25487_2_upgrade.cgi) …
Unpacking replacement webmin …
dpkg: error processing /home/test/126567_25487_2_upgrade.cgi (–install):
unable to create /usr/share/webmin/pam/config.info.de.UTF-8.dpkg-new' (while processing ./usr/share/webmin/pam/config.info.de.UTF-8’): No space left on device
dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
Webmin install complete. You can now login to https://v2:10000/
as root with your root password, or as any user who can use sudo
to run commands as root.
Errors were encountered while processing:
/home/test/126567_25487_2_upgrade.cgi

Hello,

Show us the output of df -i