konqueror crashed on startup the first time after I upgraded it

[Zooko Wilcox-O'Hearn]

$ konqueror &
[3] 25287
MAIN yukyuk:~$ konqueror(25287) KToolInvocation::klauncher: klauncher not running... launching kdeinit
kdeinit4: preparing to launch /usr/lib/kde4/libexec/klauncher
kdeinit4: preparing to launch /usr/bin/kded4
kdeinit4: preparing to launch /usr/bin/kbuildsycoca4
kbuildsycoca4 running...
kbuildsycoca4(25298) KConfigGroup::readXdgListEntry: List entry Categories in "/usr/share/applications/ooo-startcenter.desktop" is not compliant with XDG standard (missing trailing semicolon).
kbuildsycoca4(25298) KConfigGroup::readXdgListEntry: List entry MimeType in "/usr/share/applications/ooo-startcenter.desktop" is not compliant with XDG standard (missing trailing semicolon).
kbuildsycoca4(25298) KConfigGroup::readXdgListEntry: List entry Categories in "/usr/share/applications/speedcrunch.desktop" is not compliant with XDG standard (missing trailing semicolon).
kdeinit4: preparing to launch /usr/bin/kbuildsycoca4
kbuildsycoca4 running...
kdeinit4: preparing to launch /usr/lib/kde4/libexec/kconf_update
kdeinit4: preparing to launch
konqueror(25287) KonqHistoryManager::loadHistory: The history version doesn't match, aborting loading
kdeinit4: preparing to launch /usr/lib/kde4/libexec/kconf_update
KCrash: Application 'konqueror' crashing...
sock_file=/home/zooko/.kde/socket-yukyuk/kdeinit4__2
kdeinit4: preparing to launch /usr/lib/kde4/libexec/drkonqi

When I restarted it, it didn't crash and worked normally.

[Jonathan Thomas (echidnaman)]

So this happened only once after upgrade, correct? To properly handle this bug we'd need a backtrace of the crash. (https://wiki.ubuntu.com/Backtrace)
I don't know how likely is it that we'll be able to get one, though, if it was just a one-time occurrence... :(