When trying to tell urpmi to only download packages without installing them, it seems it refuses to write them inside a folder which does not belong to root, which seems like a bug:

urpmi --auto-update --noclean --no-install --download-all /home/doktor5000/mga2_upgrade
[snip]
181MB of additional disk space will be used.
179MB of packages will be retrieved.
Proceed with the installation of the 331 packages? (Y/n) Y
[snip]
invalid owner for directory /home/doktor5000/mga2_upgrade


$ ls -la /home/doktor5000/mga2_upgrade
insgesamt 8
drwxr-xr-x  2 doktor5000 doktor5000 4096 Mai 27 12:20 ./
drwxr-xr-x 70 doktor5000 doktor5000 4096 Mai 27 12:45 ../

After doing a "chown root:root /home/doktor5000/mga2_upgrade" and relaunching urpmi it works without problems. And i think it should not matter which owner that folder should have, as urpmi writes there as root, so why only limit it to only write to folders belonging to root?