Version:            (using KDE 4.1.2)
OS:                Linux
Installed from:    Debian testing/unstable Packages

I use gwenview to view images stored in a zip file. When I use "Go Up" to return to the folder level (using either alt-up, the up tool I added in the toolbar or the "up" item in the "go" menu), gwenview *always* crashes, with the following report from the kde crash handler:

A Fatal Error Occurred
The application Gwenview (gwenview) crashed and caused the signal 6 (SIGABRT).
...

Using the "show details" checkbox, I have this backtrace:

... (omitting the useless messages "no debugging symbols found")
[KCrash handler]
#5  0x00007f64945b4125 in raise () from /lib/libc.so.6
#6  0x00007f64945b5643 in abort () from /lib/libc.so.6
#7  0x00007f6494c455a5 in qt_message_output () from /usr/lib/libQtCore.so.4
#8  0x00007f6494c456e7 in qFatal () from /usr/lib/libQtCore.so.4
#9  0x00007f6496bb36b2 in ?? () from /usr/lib/libkio.so.5
#10 0x00007f6496bb6dda in KDirModel::indexForUrl () from /usr/lib/libkio.so.5
#11 0x00007f6496facbc2 in Gwenview::SortedDirModel::indexForUrl ()
   from /usr/lib/libgwenviewlib.so.4
#12 0x000000000043fcd2 in ?? ()
#13 0x0000000000441215 in ?? ()
#14 0x00007f6494d496d4 in QMetaObject::activate ()
   from /usr/lib/libQtCore.so.4
#15 0x00007f6494d7f4b4 in QAbstractItemModel::rowsInserted ()
   from /usr/lib/libQtCore.so.4
#16 0x00007f6494d2c0e5 in QAbstractItemModel::endInsertRows ()
   from /usr/lib/libQtCore.so.4
#17 0x00007f64956d634d in ?? () from /usr/lib/libQtGui.so.4
#18 0x00007f64956daa5e in ?? () from /usr/lib/libQtGui.so.4
#19 0x00007f64956dbbba in QSortFilterProxyModel::qt_metacall ()
   from /usr/lib/libQtGui.so.4
#20 0x00007f6496face65 in Gwenview::SortedDirModel::qt_metacall ()
   from /usr/lib/libgwenviewlib.so.4
#21 0x00007f6494d496d4 in QMetaObject::activate ()
   from /usr/lib/libQtCore.so.4
#22 0x00007f6494d7f4b4 in QAbstractItemModel::rowsInserted ()
   from /usr/lib/libQtCore.so.4
#23 0x00007f6494d2c0e5 in QAbstractItemModel::endInsertRows ()
   from /usr/lib/libQtCore.so.4
#24 0x00007f6496bb4611 in ?? () from /usr/lib/libkio.so.5
#25 0x00007f6496bb78e6 in KDirModel::qt_metacall () from /usr/lib/libkio.so.5
#26 0x00007f6494d496d4 in QMetaObject::activate ()
   from /usr/lib/libQtCore.so.4
#27 0x00007f6496b9d795 in KDirLister::newItems () from /usr/lib/libkio.so.5
#28 0x00007f6496b9e4e0 in KDirLister::Private::emitItems ()
   from /usr/lib/libkio.so.5
#29 0x00007f6496ba6a3d in ?? () from /usr/lib/libkio.so.5
#30 0x00007f6496ba6cb6 in KDirLister::Private::CachedItemsJob::done ()
   from /usr/lib/libkio.so.5
#31 0x00007f6496ba6ded in KDirLister::Private::CachedItemsJob::qt_metacall ()
   from /usr/lib/libkio.so.5
#32 0x00007f6494d44345 in QObject::event () from /usr/lib/libQtCore.so.4
#33 0x00007f64951e7a5d in QApplicationPrivate::notify_helper ()
   from /usr/lib/libQtGui.so.4
#34 0x00007f64951ef7da in QApplication::notify () from /usr/lib/libQtGui.so.4
#35 0x00007f64966b741b in KApplication::notify () from /usr/lib/libkdeui.so.5
#36 0x00007f6494d35381 in QCoreApplication::notifyInternal ()
   from /usr/lib/libQtCore.so.4
#37 0x00007f6494d3601a in QCoreApplicationPrivate::sendPostedEvents ()
   from /usr/lib/libQtCore.so.4
#38 0x00007f6494d5da83 in ?? () from /usr/lib/libQtCore.so.4
#39 0x00007f6490dbaacb in g_main_context_dispatch ()
   from /usr/lib/libglib-2.0.so.0
#40 0x00007f6490dbe28d in ?? () from /usr/lib/libglib-2.0.so.0
#41 0x00007f6490dbe44b in g_main_context_iteration ()
   from /usr/lib/libglib-2.0.so.0
#42 0x00007f6494d5d70f in QEventDispatcherGlib::processEvents ()
   from /usr/lib/libQtCore.so.4
#43 0x00007f649527944f in ?? () from /usr/lib/libQtGui.so.4
#44 0x00007f6494d33ca2 in QEventLoop::processEvents ()
   from /usr/lib/libQtCore.so.4
#45 0x00007f6494d33e2d in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#46 0x00007f6494d362dd in QCoreApplication::exec ()
   from /usr/lib/libQtCore.so.4
#47 0x000000000043a653 in ?? ()
#48 0x00007f64945a0466 in __libc_start_main () from /lib/libc.so.6
#49 0x0000000000422a69 in _start ()
#0  0x00007f6494620a91 in nanosleep () from /lib/libc.so.6

Running gwenview from kde 4.1.2 debian experimental packages