Description of problem:
Entering the configuration option "bootargs" in a domain configuration file in
combination with 'bootloader="/usr/bin/pygrub"' causes 'xm create mybox0' to
fail with the message: "Error: append() takes exactly one argument (2 given)".
It surely can be that I am doing something wrong here, but I can't see what...


Version-Release number of selected component (if applicable):
- Fedora Core 6 test3 (development version 2006-Oct-08)
- xen-3.0.2-44
- Clean install and a clean guest created with xenguest-install script

How reproducible:
[root@xen /etc/xen]# xm create -c mybox0
Using config file "mybox0".
Going to boot Fedora Core (2.6.18-1.2747.fc6xen)
  kernel: /boot/vmlinuz-2.6.18-1.2747.fc6xen
  initrd: /boot/initrd-2.6.18-1.2747.fc6xen.img
Error: append() takes exactly one argument (2 given)

Steps to Reproduce:
1. Put in config file /etc/xen/mybox0:
     * bootloader="/usr/bin/pygrub"
     * bootargs="-q"
2. start the domain
  
Actual results:
Domain not started

Expected results:
domain started

Additional info:
Changing the bootargs argument to [ '-q' ] does not help and fails with "Error:
'list' object has no attribute 'read'". This makes sense because the source file
 /usr/lib/python2.4/site-packages/xen/xm/create.py at line 128 requires a simple
string value like the bootloader option.