I can reproduce this in a Natty chroot on my AC100:
root@vela:/# uname -a Linux vela 2.6.29-arm2-ac100 #1 SMP PREEMPT Mon Oct 11 12:31:40 CEST 2010 armv7l armv7l armv7l GNU/Linux root@vela:/# lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 11.04 Release: 11.04 Codename: natty
root@vela:/# aptitude Illegal instruction
Incidentally, running aptitude again doesn't show this fault.
I can reproduce this in a Natty chroot on my AC100:
root@vela:/# uname -a
Linux vela 2.6.29-arm2-ac100 #1 SMP PREEMPT Mon Oct 11 12:31:40 CEST 2010 armv7l armv7l armv7l GNU/Linux
root@vela:/# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 11.04
Release: 11.04
Codename: natty
root@vela:/# aptitude
Illegal instruction
Incidentally, running aptitude again doesn't show this fault.