Version:            (using KDE KDE 3.5.5)
Installed from:    Debian testing/unstable Packages
Compiler:          g++ (GCC) 4.1.2 20060901 (prerelease) (Debian 4.1.1-13) 
OS:                Linux

I open juk, then click on one of the albums in the area on the left-hand side, and it crashes.  This is reproducible every time.

Here is the end of the backtrace:

...
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[KCrash handler]
#5  0x080e0a31 in FileHandle::FileHandle ()
#6  0x0813978a in PlaylistItem::file ()
#7  0x081133c4 in Playlist::time ()
#8  0x0812cd4e in PlaylistCollection::time ()
#9  0x08145a79 in StatusLabel::updateData ()
#10 0x08137527 in Watched::dataChanged ()
#11 0x0813303c in PlaylistCollection::raise ()
#12 0x08127187 in PlaylistBox::slotPlaylistChanged ()
#13 0x08127500 in PlaylistBox::contentsMouseReleaseEvent ()
#14 0xa6905da9 in QScrollView::viewportMouseReleaseEvent ()
   from /usr/lib/libqt-mt.so.3
#15 0xa6907336 in QScrollView::eventFilter () from /usr/lib/libqt-mt.so.3
#16 0xa68cf396 in QListView::eventFilter () from /usr/lib/libqt-mt.so.3
#17 0xa67d1266 in QObject::activate_filters () from /usr/lib/libqt-mt.so.3
#18 0xa67d12e4 in QObject::event () from /usr/lib/libqt-mt.so.3
#19 0xa6808576 in QWidget::event () from /usr/lib/libqt-mt.so.3
#20 0xa6769bd6 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#21 0xa676bd79 in QApplication::notify () from /usr/lib/libqt-mt.so.3
#22 0xa6f09e0e in KApplication::notify () from /usr/lib/libkdecore.so.4
#23 0xa66fd445 in QApplication::sendSpontaneousEvent ()
   from /usr/lib/libqt-mt.so.3
#24 0xa66fc0df in QETWidget::translateMouseEvent ()
   from /usr/lib/libqt-mt.so.3
#25 0xa66fa660 in QApplication::x11ProcessEvent () from /usr/lib/libqt-mt.so.3
#26 0xa6710cb2 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#27 0xa6784129 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#28 0xa6783f4a in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#29 0xa676b76f in QApplication::exec () from /usr/lib/libqt-mt.so.3
#30 0x08107cc5 in main ()


I haven't used juk in a while and I have moved some files and directories around on my system, so this might be caused by the previously registered files not being at the same place anymore or something like that.  But it should handle that a little better.