[Fedora-xen] kernel-xen0-2.6.18-1.2200.fc5 amusingly unhappy

[Matt Bernstein]

[root at hyperion ~]# cat /proc/version
Linux version 2.6.18-1.2200.fc5xen0 (brewbuilder at hs20-bc2-3.build.redhat.com) (gcc version 4.1.1 20060525 (Red Hat 4.1.1-1)) #1 SMP Sat Oct 14 17:49:47 EDT 2006
[root at hyperion ~]# getenforce
Permissive
[root at hyperion ~]# xm list
Error: Error connecting to xend: No such file or directory.  Is xend running?
[root at hyperion ~]# /etc/init.d/xend status
xend is running

Reverting to 2.6.17-1.2157_FC5xen0 fixes this problem.