kubuntu ubiquity crashes after first page

today I got this in the installer from the desktop image. The crash seems to be in QTextEngine so it's probably an issue in Qt or kdebindings

#0 0x0142df6b in QTextEngine::boundingBox(int, int) const () from /usr/lib/libQtGui.so.4
#1 0x0140407a in QFontMetrics::boundingRect(QString const&) const () from /usr/lib/libQtGui.so.4
#2 0x015d0359 in ?? () from /usr/lib/libQtGui.so.4
#3 0x015d0576 in QComboBox::sizeHint() const () from /usr/lib/libQtGui.so.4
#4 0x00e477bc in ?? () from /usr/lib/pymodules/python2.6/PyQt4/QtGui.so
#5 0x011e16c3 in QWidgetItemV2::updateCacheIfNecessary() const () from /usr/lib/libQtGui.so.4
#6 0x011e2700 in QWidgetItemV2::minimumSize() const () from /usr/lib/libQtGui.so.4
#7 0x011d5b5d in ?? () from /usr/lib/libQtGui.so.4
#8 0x011d6582 in ?? () from /usr/lib/libQtGui.so.4
#9 0x011d68fa in QGridLayout::setGeometry(QRect const&) () from /usr/lib/libQtGui.so.4
#10 0x00dd984e in ?? () from /usr/lib/pymodules/python2.6/PyQt4/QtGui.so
#11 0x011ddc3f in QLayoutPrivate::doResize(QSize const&) () from /usr/lib/libQtGui.so.4
#12 0x011ddd67 in QLayout::activate() () from /usr/lib/libQtGui.so.4
#13 0x011df30b in QLayout::widgetEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#14 0x011a64a6 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#15 0x011ad0d9 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#16 0x028b0b2a in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#17 0x023b6823 in sipKApplication::notify(QObject*, QEvent*) () from /usr/lib/pymodules/python2.6/PyKDE4/kdeui.so
#18 0x007978db in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4

not showing the new progress bar seems to stop the crash

Worked around for alpha-3; moving to beta-1.

ubiquity (2.1.26) lucid; urgency=low

  [ Evan Dandrea ]
  * Specify migrationassistant's order as simply coming before summary,
    as setting it as coming after user-setup and partman was causing it
    to come after summary (LP: #526581).

  [ Jonathan Riddell ]
  * kde_ui.py: don't show integrated progress bar, it seems to cause a crash
    https://launchpad.net/bugs/526534
  * kde_ui.py: Show progressDialog for install, still needed (LP: #526454)

 -- Jonathan Riddell <email address hidden> Wed, 24 Feb 2010 13:11:43 +0000

16:21 <Riddell> cjwatson: no, hiding the progress bar is a workaround, I'd like to find the cause after the alpha

For me is impossible to install Kubuntu from cd's menu
The only way to install is to select "Try kubuntu whithout change ....." load all the live and from application : sistem : install kubuntu 10.04 .

On alpha3 my ubiquity log is as follows:

Ubiquity 2.1.28
trying to create local folder /var/tmp/kdecache-root/kpc: Permission denied
trying to create local folder /var/tmp/kdecache-root/kpc: Permission denied
trying to create local folder /var/tmp/kdecache-root/kpc: Permission denied
trying to create local folder /var/tmp/kdecache-root/kpc: Permission denied
kubuntu-ubiquity(3258): Failed to lock file "/var/tmp/kdecache-root/kpc/kde-icon-cache.lock" , last result = 2
kubuntu-ubiquity(3258): Couldn't create index file "/var/tmp/kdecache-root/kpc/kde-icon-cache.index"
QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed: Permission denied
QFileSystemWatcher: failed to add paths: /root/.config/ibus/bus
Bus::open: Can not get ibus-daemon's address.
IBusInputContext::createInputContext: no connection to ibus-daemon
kubuntu-ubiquity(3258): Failed to lock file "/var/tmp/kdecache-root/kpc/kde-icon-cache.lock" , last result = 2
kubuntu-ubiquity(3258): Failed to lock file "/var/tmp/kdecache-root/kpc/kde-icon-cache.lock" , last result = 2
kubuntu-ubiquity(3258): Failed to lock file "/var/tmp/kdecache-root/kpc/kde-icon-cache.lock" , last result = 2
kubuntu-ubiquity(3258): Failed to lock file "/var/tmp/kdecache-root/kpc/kde-icon-cache.lock" , last result = 2
kubuntu-ubiquity(3258): Failed to lock file "/var/tmp/kdecache-root/kpc/kde-icon-cache.lock" , last result = 2
kubuntu-ubiquity(3258): Failed to lock file "/var/tmp/kdecache-root/kpc/kde-icon-cache.lock" , last result = 2
kubuntu-ubiquity(3258): Failed to lock file "/var/tmp/kdecache-root/kpc/kde-icon-cache.lock" , last result = 2
kubuntu-ubiquity(3258): Failed to lock file "/var/tmp/kdecache-root/kpc/kde-icon-cache.lock" , last result = 2
trying to create local folder /var/tmp/kdecache-root/kpc: Permission denied
trying to create local folder /var/tmp/kdecache-root/kpc: Permission denied
trying to create local folder /var/tmp/kdecache-root/kpc: Permission denied
trying to create local folder /var/tmp/kdecache-root/kpc: Permission denied
kubuntu-ubiquity(3258): Failed to lock file "/var/tmp/kdecache-root/kpc/kde-icon-cache.lock" , last result = 2
kubuntu-ubiquity(3258): Couldn't create index file "/var/tmp/kdecache-root/kpc/kde-icon-cache.index"
FIXME, medianotifier unload port to KDE 4
kubuntu-ubiquity(3258): Failed to lock file "/var/tmp/kdecache-root/kpc/kde-icon-cache.lock" , last result = 2
kubuntu-ubiquity(3258): Failed to lock file "/var/tmp/kdecache-root/kpc/kde-icon-cache.lock" , last result = 2
kubuntu-ubiquity(3258): Failed to lock file "/var/tmp/kdecache-root/kpc/kde-icon-cache.lock" , last result = 2
kubuntu-ubiquity(3258): Failed to lock file "/var/tmp/kdecache-root/kpc/kde-icon-cache.lock" , last result = 2
kubuntu-ubiquity(3258): Failed to lock file "/var/tmp/kdecache-root/kpc/kde-icon-cache.lock" , last result = 2
kubuntu-ubiquity(3258): Failed to lock file "/var/tmp/kdecache-root/kpc/kde-icon-cache.lock" , last result = 2
kubuntu-ubiquity(3258): Failed to lock file "/var/tmp/kdecache-root/kpc/kde-icon-cache.lock" , last result = 2
kubuntu-ubiquity(3258): Failed to lock file "/var/tmp/kdecache-root/kpc/kde-icon-cache.lock" , last result = 2
kubuntu-ubiquity(3258): Fail...

The issues in this bug have been fixed/changed in the codebase. If any one particular issue comes back, it should be opened as a separate bug.