ubiquity ceased displaying buttons during install

[Ian Mackenzie]

Binary package hint: ubiquity

Kubuntu 9.04 alpha6

PC: nvidia 6100 M/B, Sempron 2100, 2GB RAM, 40GB IDE HDD
Booted off CD, clicked on install,
After manually partitioning (it recognised my partitions & let me choose to wipe / but keep /home - improvement from Alpha 5), I got to the "Who are you" screen, and there were no "Continue", "Cancel", or "Back" buttons visible.
The (logical) buttons can be tabbed to, and pressing the spacebar activates them

The "Ready To Install" screen also has no buttons.
again, the buttons are not visible, but can be tabbed to and activated with the spacebar.

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
InterpreterPath: /usr/bin/python2.6
Package: ubiquity 1.11.16
ProcAttrCurrent: unconfined
ProcCmdline: /usr/bin/python /usr/lib/ubiquity/bin/ubiquity kde_ui
ProcEnviron: Error: [Errno 13] Permission denied: '/proc/5866/environ'
PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', 'kde_ui']
SourcePackage: ubiquity
Title: ubiquity crashed with IndexError in paintEvent()
Traceback:
 Traceback (most recent call last):
   File "/usr/lib/ubiquity/ubiquity/frontend/kde_components/Timezone.py", line 121, in paintEvent
     painter.drawPixmap(self.rect(), self.zonePixmaps[c.zone + 11])
 IndexError: list index out of range
Uname: Linux 2.6.28-9-generic i686
UserGroups: