I found a little bug when setting the aspect-ratio manually to 2.4:1 in Properties-menu for the current video playing. I'm using the CVS-version. Here is the output from the terminal:
kplayer: 17:33:47:633 KPlayerActionList::plug
kplayer: 17:33:47:633 Name subtitle_streams
kplayer: 17:33:47:633 KPlayer::enableSubmenu subtitle_streams true
kplayer: 17:33:47:633 Inserting separators
kplayer: 17:33:47:633 Containers 1
kplayer: 17:33:47:633 Container KPopupMenu subtitles
kplayer: 17:33:47:633 Index 0
kplayer: 17:33:47:633 Containers 1
kplayer: 17:33:47:634 Container KPopupMenu subtitles
kplayer: 17:33:47:634 Index 2
kplayer: 17:33:47:634 Settings::setInitialDisplaySize
KCrash: Application 'kplayer' crashing...
And here is the backtrace from KDE crasch handler:
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread -1233114912 (LWP 17274)]
[KCrash handler]
#6 0x08135f3b in KPlayerDisplaySizeProperty::value ()
#7 0x0813fa48 in KPlayerTrackProperties::getDisplaySize ()
#8 0x0812ecf9 in KPlayerSettings::setInitialDisplaySize ()
#9 0x0819aa56 in KPlayerEngine::refreshProperties ()
#10 0x081a05c0 in KPlayerEngine::qt_invoke ()
#11 0xb6f359b8 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#12 0xb6f36330 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#13 0x081356b9 in KPlayerProperties::updated ()
#14 0x0814e021 in KPlayerProperties::update ()
#15 0x0814eb0f in KPlayerProperties::commit ()
#16 0x081fad14 in KPlayerPropertiesDialog::slotApply ()
#17 0xb7874423 in KDialogBase::qt_invoke () from /usr/lib/libkdeui.so.4
#18 0x081fb343 in KPlayerPropertiesDialog::qt_invoke ()
#19 0x081fb37b in KPlayerDiskTrackPropertiesDialog::qt_invoke ()
#20 0x081fb3bb in KPlayerItemPropertiesDialog::qt_invoke ()
#21 0xb6f359b8 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#22 0xb6f36330 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#23 0xb72caafb in QButton::clicked () from /usr/lib/libqt-mt.so.3
#24 0xb6fd3f30 in QButton::mouseReleaseEvent () from /usr/lib/libqt-mt.so.3
#25 0xb6f6c65d in QWidget::event () from /usr/lib/libqt-mt.so.3
#26 0xb6ecca60 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#27 0xb6ecec1e in QApplication::notify () from /usr/lib/libqt-mt.so.3
#28 0xb75d5c32 in KApplication::notify () from /usr/lib/libkdecore.so.4
#29 0x080d2e08 in KPlayerApplication::notify ()
#30 0xb6e5f25d in QApplication::sendSpontaneousEvent ()
from /usr/lib/libqt-mt.so.3
#31 0xb6e5dec2 in QETWidget::translateMouseEvent ()
from /usr/lib/libqt-mt.so.3
#32 0xb6e5bfac in QApplication::x11ProcessEvent () from /usr/lib/libqt-mt.so.3
#33 0xb6e73180 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#34 0xb6ee7136 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#35 0xb6ece587 in QApplication::enter_loop () from /usr/lib/libqt-mt.so.3
#36 0xb70ea3e9 in QDialog::exec () from /usr/lib/libqt-mt.so.3
#37 0x0816cc8d in KPlayerEngine::fileProperties ()
#38 0x081a066b in KPlayerEngine::qt_invoke ()
#39 0xb6f3588b in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#40 0xb6f36330 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#41 0xb779da89 in KAction::activated () from /usr/lib/libkdeui.so.4
#42 0xb77db212 in KAction::slotActivated () from /usr/lib/libkdeui.so.4
#43 0xb78a337d in KAction::slotPopupActivated () from /usr/lib/libkdeui.so.4
#44 0xb78a3641 in KAction::qt_invoke () from /usr/lib/libkdeui.so.4
#45 0xb6f3588b in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#46 0xb72c1ae0 in QSignal::signal () from /usr/lib/libqt-mt.so.3
#47 0xb6f5581e in QSignal::activate () from /usr/lib/libqt-mt.so.3
#48 0xb705bf1b in QPopupMenu::mouseReleaseEvent () from /usr/lib/libqt-mt.so.3
#49 0xb77a48de in KPopupMenu::mouseReleaseEvent () from /usr/lib/libkdeui.so.4
#50 0xb6f6c65d in QWidget::event () from /usr/lib/libqt-mt.so.3
#51 0xb6ecca60 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#52 0xb6ecec1e in QApplication::notify () from /usr/lib/libqt-mt.so.3
#53 0xb75d5c32 in KApplication::notify () from /usr/lib/libkdecore.so.4
#54 0x080d2e08 in KPlayerApplication::notify ()
#55 0xb6e5f25d in QApplication::sendSpontaneousEvent ()
from /usr/lib/libqt-mt.so.3
#56 0xb6e5db9f in QETWidget::translateMouseEvent ()
from /usr/lib/libqt-mt.so.3
#57 0xb6e5bfac in QApplication::x11ProcessEvent () from /usr/lib/libqt-mt.so.3
#58 0xb6e73180 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#59 0xb6ee7136 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#60 0xb6ee6f46 in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#61 0xb6ece609 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#62 0x080e2145 in main ()
Logged In: YES
user_id=137121
Originator: NO
Fixed in the latest CVS.
Thanks for reporting!