I completely agree with Eudemus. I'm running ubuntu feisty, with the 2.6.20-15-generic kernell and KDE 3.5.6.
Today i installed vdccm + synce-kde + raki + ksync in order to get my ipaq2220 synced with kontact (korganizer 3.5.6). 
Connection works fine, i can browse my pda files from my computer, and can get info about battery status etc.

However, when i want to sync appointments and/or tasks it crashes when acquiring the data. Since i have many appointments i'll post below the terminal output from starting raki to crashing on tasks syncing (i've got 5 tasks atm). Below that i'll put my backtrace.

Maybe this extra info can help as well: i'm using Q.t 4.2.3 and have installed all above packages from the ubuntu repositories. That includes synce-kde 0.9.1-1ubuntu2 which is supposed to fix this bug. I hope someone can find a sollution to the problem. Concerning the suggestion of building it myself, if that still sticks, could anyone explain me how then?

KONSOLE
jorrit@medion:~$ raki: ... init
raki: Subscribing Todos ...
kresources: ERROR: ManagerImpl::readResourceConfig: mFactory is 0. Did the app forget to call readConfig?
raki: ERROR: Received DCOP: resource added for unknown resource zN2DQGGIMm
raki: SynCEDeviceKonnector::readSyncees()...
raki: Retrieving Todo from device: RRA-ID-05002a66
raki:     ID-Pair: KDEID: RRA-ID-05002a66 DeviceID: RRA-ID-05002a66
raki: Retrieving Todo from device: RRA-ID-0a001dd8
raki:     ID-Pair: KDEID: RRA-ID-0a001dd8 DeviceID: RRA-ID-0a001dd8
raki: Retrieving Todo from device: RRA-ID-00002a42
raki:     ID-Pair: KDEID: RRA-ID-00002a42 DeviceID: RRA-ID-00002a42
raki: Retrieving Todo from device: RRA-ID-0d002a63
raki:     ID-Pair: KDEID: RRA-ID-0d002a63 DeviceID: RRA-ID-0d002a63
raki: Retrieving Todo from device: RRA-ID-05001d6e
raki:     ID-Pair: KDEID: RRA-ID-05001d6e DeviceID: RRA-ID-05001d6e
KCrash: Application 'raki' crashing...

BACKTRACE
(no debugging symbols found)
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
(no debugging symbols found)
(no debugging symbols found)
....AND SO ON...
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread -1234221360 (LWP 19741)]
[New Thread -1240433776 (LWP 19931)]
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
....AND SO ON...
(no debugging symbols found)
(no debugging symbols found)
[KCrash handler]
#6  0xb69512be in __dynamic_cast () from /usr/lib/libstdc++.so.6
#7  0xb57cebca in KSync::TodoSyncee::addEntry () from /usr/lib/libksynce.so.0
#8  0xb5412382 in PocketPCCommunication::TodoHandler::insertIntoCalendarSyncee
    () from /usr/lib/libsyncedevicekonnector.so
#9  0xb541579e in PocketPCCommunication::TodoHandler::readSyncee ()
   from /usr/lib/libsyncedevicekonnector.so
#10 0xb541cd52 in KSync::SynCEDeviceKonnector::readSyncees ()
   from /usr/lib/libsyncedevicekonnector.so
#11 0xb6142b05 in KSync::SynCEEngine::go () from /usr/lib/librakikpimsync.so
#12 0xb613f870 in PimSyncManager::startSync ()
   from /usr/lib/librakikpimsync.so
#13 0xb613c851 in RakiKPimSync::sync () from /usr/lib/librakikpimsync.so
#14 0x080a3db3 in RakiSyncPlugin::doSync ()
#15 0x0807f422 in SyncTaskListItem::syncReal ()
#16 0x08083467 in SyncThread::syncReal ()
#17 0x080a3b34 in SyncThreadThreadData::customEvent ()
#18 0xb6feaf8d in QObject::event () from /usr/lib/libqt-mt.so.3
#19 0xb6f82a60 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#20 0xb6f8488f in QApplication::notify () from /usr/lib/libqt-mt.so.3
#21 0xb7746ce2 in KApplication::notify () from /usr/lib/libkdecore.so.4
#22 0xb6f151e9 in QApplication::sendEvent () from /usr/lib/libqt-mt.so.3
#23 0xb6f83a98 in QApplication::sendPostedEvents ()
   from /usr/lib/libqt-mt.so.3
#24 0xb6f83ba0 in QApplication::sendPostedEvents ()
   from /usr/lib/libqt-mt.so.3
#25 0xb6f290dd in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#26 0xb6f9d136 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#27 0xb6f9cf46 in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#28 0xb6f84609 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#29 0x0806b5a1 in main ()