[Fedora-xen] Fedora 7 test 4 (6.93) / F7 RC2 Xen IPv6 (turned off) install problem

[Rob]

#  rpm -qa |grep xen
xen-libs-3.1.0-0.rc7.1.fc7
xen-3.1.0-0.rc7.1.fc7
kernel-xen-2.6.20-2925.9.fc7

I found one apparent cause of one of the problems I was having with new domU 
installs on Fedora 7 test 4 (6.93) and F7 RC2.

If you turn off IPv6 support and try to assign a manual IPv4 address, you get 
a stack trace on the Alt-1 console and on the Alt-3 console an error msg 
saying "Cannot determine address family of [your install URL]".

Also, on F7 RC2 I got an error msg when trying to assign a netmask of 
255.255.0.0 for an IPv4 address of 10.0.216.102 saying something must be 
between 0 and 32 for IPv4?

I hope others can confirm this, not sure of the problem is with virt-manager, 
Xen or the installer...

Still seeing this in dmesg, not sure if it is a problem:

ACPI: PCI Interrupt 0000:00:1f.4[C] -> GSI 23 (level, low) -> IRQ 17
PCI: Setting latency timer of device 0000:00:1f.4 to 64
uhci_hcd 0000:00:1f.4: UHCI Host Controller
uhci_hcd 0000:00:1f.4: new USB bus registered, assigned bus number 2
uhci_hcd 0000:00:1f.4: irq 17, io base 0x00002460
usb usb2: configuration #1 chosen from 1 choice
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 2 ports detected
ohci_hcd: 2006 August 04 USB 1.1 'Open' Host Controller (OHCI) Driver
BUG: at kernel/lockdep.c:1858 trace_hardirqs_on()
  [<c1005d9e>] show_trace_log_lvl+0x1a/0x2f
  [<c1006347>] show_trace+0x12/0x14
  [<c10063c2>] dump_stack+0x16/0x18
  [<c1037435>] trace_hardirqs_on+0xc4/0x143
  [<c10055d4>] restore_all+0x3b/0x3e
  =======================