The same problems with apt-get as described above, including a heavily bricked K5, happend to me, too.
After replacing
Code:
mount -o loop -t ext3 /mnt/us/debian.ext3 /mnt/debian
by
Code:
mount -o loop -t ext3 /mnt/base-us/debian.ext3 /mnt/debian
everything works fine.
This avoids file transfers through that strange mount loop on /mnt/us. RAM monitoring with
shows always more than 6 MB free RAM.
As I don`t understand that strange /mnt/us loop, I don`t know, whether this is save. Up to now it works.
BTW: I have no swap file/partition. Debian version is
testing. /etc/issues says wheezy/sid.