Description of problem:
I'm not able to add virtual bridged network card. Traceback pops up.


Version-Release number of selected component (if applicable):
virt-manager-0.5.2-2.fc8
libvirt-0.3.3-2.fc8


How reproducible:
always


Steps to Reproduce:
1. # brctl addbr br0
2. # brctl addif br0 eth0
3. Details > Add network card > Shared physical device > select only one 
possible there


Actual results:
GUI shows traceback, this traceback is also on the command line, virt-manager 
starts to generate also this "libvir: QEMU chyba : TAP bridge path 'eth0 
(Bridge br0)' is too long" on the command line.


Expected results:
Virtual card is created


Additional info:

Traceback in the GUI:

Unable to complete install '<class 'libvirt.libvirtError'> virDomainDefineXML() 
failed TAP bridge path 'eth0 (Bridge br0)' is too long
Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/addhardware.py", line 530, in 
add_device
    self.vm.add_device(xml)
  File "/usr/share/virt-manager/virtManager/domain.py", line 690, in add_device
    self.get_connection().define_domain(newxml)
  File "/usr/share/virt-manager/virtManager/connection.py", line 445, in 
define_domain
    self.vmm.defineXML(xml)
  File "/usr/lib64/python2.5/site-packages/libvirt.py", line 589, in defineXML
    if ret is None:raise libvirtError('virDomainDefineXML() failed', conn=self)
libvirtError: virDomainDefineXML() failed TAP bridge path 'eth0 (Bridge br0)' 
is too long
'

Traceback in the command line:

Gtk-Message: (for origin information, set GTK_DEBUG): failed to retrieve 
property `GtkTreeView::odd-row-color' of type `GdkColor' from rc file value 
"((GString*) 0x12bb6e0)" of type `GString'
Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/addhardware.py", line 649, in 
change_graphics_type
    graphics = self.get_config_graphics()
  File "/usr/share/virt-manager/virtManager/addhardware.py", line 279, in 
get_config_graphics
    return type.get_model().get_value(type.get_active_iter(), 1)
TypeError: iter must be a GtkTreeIter
Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/addhardware.py", line 649, in 
change_graphics_type
    graphics = self.get_config_graphics()
  File "/usr/share/virt-manager/virtManager/addhardware.py", line 279, in 
get_config_graphics
    return type.get_model().get_value(type.get_active_iter(), 1)
TypeError: iter must be a GtkTreeIter
libvir: QEMU chyba : TAP bridge path 'eth0 (Bridge br0)' is too long
libvir: QEMU chyba : TAP bridge path 'eth0 (Bridge br0)' is too long
libvir: QEMU chyba : TAP bridge path 'eth0 (Bridge br0)' is too long

I'm not sure that this is not my fault (bad bridge set-up), but I think virt-
manager should provide some error message instead of the traceback.