Plasma widget Adjustable Clock crash entire plasma-desktop

Binary package hint: plasma-widget-adjustableclock

Greetings.

- Add the plasma widget "Adjustable Clock" to panel
OR
- launch plasmoidviewer adjustableclock

- open plasmoid settings
- change ANY setting
- press OK

The entire plasma-desktop crash.
(it restarts a few seconds later, with adjustable clock settings unchanged)

Reproducible ALWAYS on
Kubuntu 10.4 beta1 unchanged
Kubuntu 10.4 beta1 + updates up to 25/03/2010

Terminal output:

plasmoidviewer(6370)/plasma main: setting FormFactor to "planar"
plasmoidviewer(6370)/plasma main: setting Location to "floating"
plasmoidviewer(6370)/plasma main: setting containment to "null"
plasmoidviewer(6370)/plasma main: setting auth policy
QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed: Nessun file o directory
QFileSystemWatcher: failed to add paths: /home/mini/.config/ibus/bus
Bus::open: Can not get ibus-daemon's address.
IBusInputContext::createInputContext: no connection to ibus-daemon
plasmoidviewer(6370)/plasma main: just load applet
plasmoidviewer(6370)/plasma FullView::addApplet: adding applet "adjustableclock" in "null"
plasmoidviewer(6370)/libplasma Plasma::CoronaPrivate::addContainment: loading of containment "null" failed.
plasmoidviewer(6370)/kdecore (KSycoca) KSycocaPrivate::openDatabase: Trying to open ksycoca from "/var/tmp/kdecache-mini/ksycoca4"
findServiceByDesktopPath: not found
plasmoidviewer(6370)/libplasma Plasma::AppletPrivate::init: Check your constructor! You probably want to be passing in a Service::Ptr or a QVariantList with a valid storageid as arg[0].
plasmoidviewer(6370)/libplasma Plasma::ExtenderPrivate::loadExtenderItems: applet id = 2
plasmoidviewer(6370)/libplasma Plasma::ExtenderPrivate::loadExtenderItems: sourceappletid = 2
plasmoidviewer(6370)/kdecore (K*TimeZone*) KSystemTimeZonesPrivate::instance: instance(): ... initialised
plasmoidviewer(6370)/kdecore (K*TimeZone*) KSystemTimeZonesPrivate::readConfig: readConfig(): local zone= "Europe/Rome"
plasmoidviewer(6370)/kdecore (K*TimeZone*) KSystemTimeZonesPrivate::readZoneTab: readZoneTab( "/usr/share/zoneinfo/zone.tab" )
plasmoidviewer(6370)/plasma CalendarEngine::sourceRequestEvent: "isHoliday::2010-03-25"
plasmoidviewer(6370)/plasma CalendarEngine::sourceRequestEvent: "isHoliday"
plasmoidviewer(6370)/plasma CalendarEngine::sourceRequestEvent: "2010-03-25"
plasmoidviewer(6370)/plasma CalendarEngine::sourceRequestEvent: "holidaysRegions"
plasmoidviewer(6370)/libplasma Plasma::AuthorizationManagerPrivate::matchingRule: no matching rule
KCrash: Application 'plasmoidviewer' crashing...