Version:           4.2.00 (using KDE 4.2.0)
Compiler:          using kubuntu AMD64 
OS:                Linux
Installed from:    Ubuntu Packages

Seems similar to https://bugs.kde.org/show_bug.cgi?id=182033, but this was in 4.2.0

I chose to install some popular windows fonts directly from the NTFS mounted partition. I picked out several files at the same time (approx 20) and installed. Application finishes with a SEGV. Fonts seems to have been installed though. The fonts in question were the "C*" ones (Cordoba, Consolas etc.) + Verdana.

Here's the stack traces:

Application: System Settings (systemsettings), signal SIGSEGV
0x00007fea6eafd621 in nanosleep () from /lib/libc.so.6
[Current thread is 0 (LWP 27804)]

Thread 2 (Thread 0x411c7950 (LWP 27820)):
#0  0x00007fea6eb34482 in select () from /lib/libc.so.6
#1  0x00007fea7044d006 in ?? () from /usr/lib/libQtCore.so.4
#2  0x00007fea70384362 in ?? () from /usr/lib/libQtCore.so.4
#3  0x00007fea6c73f3ea in start_thread () from /lib/libpthread.so.0
#4  0x00007fea6eb3bc6d in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fea722946f0 (LWP 27804)):
[KCrash Handler]
#5  0x00007fea6fc2fc5b in ?? () from /usr/lib/libQtGui.so.4
#6  0x00007fea6fc2fd1d in QSortFilterProxyModel::mapFromSource () from /usr/lib/libQtGui.so.4
#7  0x00007fea6fc29c69 in QSortFilterProxyModel::parent () from /usr/lib/libQtGui.so.4
#8  0x00007fea6fbe30d5 in QTreeView::indexRowSizeHint () from /usr/lib/libQtGui.so.4
#9  0x00007fea6fbe3805 in ?? () from /usr/lib/libQtGui.so.4
#10 0x00007fea6fbe8845 in QTreeView::verticalOffset () from /usr/lib/libQtGui.so.4
#11 0x00007fea6fbb41ce in ?? () from /usr/lib/libQtGui.so.4
#12 0x00007fea6f78ce7f in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#13 0x00007fea6f78d232 in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#14 0x00007fea6f78d15b in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#15 0x00007fea6f78d15b in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#16 0x00007fea6f78c808 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#17 0x00007fea6f78d232 in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#18 0x00007fea6f78c808 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#19 0x00007fea6f78d232 in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#20 0x00007fea6f78c808 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#21 0x00007fea6f78d232 in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#22 0x00007fea6f78c808 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#23 0x00007fea6f78d232 in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#24 0x00007fea6f78c808 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#25 0x00007fea6f78d232 in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#26 0x00007fea6f78d15b in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#27 0x00007fea6f78c808 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#28 0x00007fea6f78d232 in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#29 0x00007fea6f78c808 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#30 0x00007fea6f78d232 in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#31 0x00007fea6f78c808 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#32 0x00007fea6f78d232 in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#33 0x00007fea6f78c808 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#34 0x00007fea6f78d232 in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#35 0x00007fea6f78c808 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#36 0x00007fea6f78d232 in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#37 0x00007fea6f78c808 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#38 0x00007fea6f78d232 in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#39 0x00007fea6f78c808 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#40 0x00007fea6f78d232 in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#41 0x00007fea6f78c808 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#42 0x00007fea6f78d232 in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#43 0x00007fea6f78c808 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#44 0x00007fea6f8e6664 in ?? () from /usr/lib/libQtGui.so.4
#45 0x00007fea6f8e6b17 in ?? () from /usr/lib/libQtGui.so.4
#46 0x00007fea6f78df35 in QWidget::event () from /usr/lib/libQtGui.so.4
#47 0x00007fea6f73bc3d in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#48 0x00007fea6f7439ba in QApplication::notify () from /usr/lib/libQtGui.so.4
#49 0x00007fea710483eb in KApplication::notify () from /usr/lib/libkdeui.so.5
#50 0x00007fea7046cd61 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#51 0x00007fea7046d9fa in QCoreApplicationPrivate::sendPostedEvents () from /usr/lib/libQtCore.so.4
#52 0x00007fea704954d3 in ?? () from /usr/lib/libQtCore.so.4
#53 0x00007fea6b663d3b in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#54 0x00007fea6b66750d in ?? () from /usr/lib/libglib-2.0.so.0
#55 0x00007fea6b6676cb in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#56 0x00007fea7049515f in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#57 0x00007fea6f7cda6f in ?? () from /usr/lib/libQtGui.so.4
#58 0x00007fea7046b682 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#59 0x00007fea7046b80d in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#60 0x00007fea7046dcbd in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#61 0x0000000000411c76 in _start ()