In previous releases, netstat -ci would display stats for
network interfaces continuously.  In 6.1, it shows stats
once, then crashes.

[root@squid-1 logs]# netstat -ci
Kernel Interface table
Iface   MTU Met    RX-OK RX-ERR RX-DRP RX-OVR    TX-OK
TX-ERR TX-DRP TX-OVR Flg
eth0   1500   0  1158442      0      0      0  1192714
0      0      0 BRU
lo     3924   0     8856      0      0      0     8856
0      0      0 LRU
Kernel Interface table
Iface   MTU Met    RX-OK RX-ERR RX-DRP RX-OVR    TX-OK
TX-ERR TX-DRP TX-OVR Flg
SIOCGIFCONF: Inappropriate ioctl for device
missing interface information: Inappropriate ioctl for
device
[root@squid-1 logs]#

I've checked this on multiple 6.1, 5.2, 5.2 (with 2.2 kernel
upgrades), and 6.0 systems.  All (and only) the 6.1 systems
exhibit this problem.