Confirm this bug when using /var/log as tmpfs on asus eee pc: tmpfs /var/log tmpfs defaults 0 0
adding the line at end of /etc/fstab tmpfs /var/log/apt tmpfs defaults 0 0 helps me.
Confirm this bug when using /var/log as tmpfs on asus eee pc:
tmpfs /var/log tmpfs defaults 0 0
adding the line at end of /etc/fstab
tmpfs /var/log/apt tmpfs defaults 0 0
helps me.