Description of problem:

The f7t4 rescue CD fails to mount the existing partitions on my hard disks,
either read-write or read-only.  Anaconda reports the following:

File "/usr/bin/anaconda", line 87 in <module>
rescue.runRescue(anaconda, instClass)
File "/usr/lib/anaconda/rescue.py", line 297, in runRescue
disks = upgrade.findExistingRoots(anaconda, upgradeany = 1)
File "/usr/lib/anaconda/upgrade.py", line 91, in findExistingRoots
anaconda.id.diskset.openDevices()
File "/usr/lib/anaconda/partedUtils.py", line 1156, in openDevices
custom_icon="warning")
TypeError: messageWindow() got an unexpected keyword argument 'custom_buttons'
install exited abnormally

If I skip disk mounting I can see my partitions in /proc/partitions.  (Well,
most of them:  one of my disks has 20 partitions but /proc/partitions only shows
16.)  I can mount partitions by hand.


Version-Release number of selected component (if applicable):
f7t4 rescue CD


How reproducible:
always



Additional info:
I have two IDE controllers, one on the motherboard (pata_via) and one PCI
(pata_cmd64x).  Each controller has one attached disk.