~ $ XDG_DATA_HOME="${MARBLE_DATA_HOME:-/home/user/MyDocs/.local/share}"
~ $ export XDG_DATA_HOME
~ $ LD_LIBRARY_PATH="/opt/marble/lib:${LD_LIBRARY_PATH}"
~ $ export LD_LIBRARY_PATH
~ $ PATH="/opt/marble/bin:${PATH}"
~ $ export PATH
~ $ gdb /opt/marble/bin/marble 
GNU gdb (GDB) 6.8.50.20090417-debian
...
(gdb) run
Starting program: /opt/marble/bin/marble 
(no debugging symbols found)
....
Unsupported date format character at 1 (%-d.%-m.)
....
Dec 22 23:26:56 Nokia-N900 marble[3998]: GLIB CRITICAL ** GLib-GObject - g_object_get: assertion `G_IS_OBJECT (object)' failed
Dec 22 23:26:57 Nokia-N900 marble[3998]: GLIB CRITICAL ** Gtk - gtk_widget_set_sensitive: assertion `GTK_IS_WIDGET (widget)' failed
Dec 22 23:26:59 Nokia-N900 dbus[766]: WARNING: match destination=':1.539' added by :1.539 (pid=3998, uid=29999) who owns services:
Dec 22 23:26:59 Nokia-N900 dbus[766]:  :1.539
(no debugging symbols found)
Time elapsed: 1088 ms
Model: Time elapsed: 1 ms
ReadSettings: mapThemeId:  "earth/openstreetmap/openstreetmap.dgml" 
Updating Settings ... 
(no debugging symbols found)
Unsupported DBUS type:  0 

Program received signal SIGSEGV, Segmentation fault.
0x400fc4a0 in QString::toLatin1() const () from /usr/lib/libQtCore.so.4
0x400fc4a0 <_ZNK7QString8toLatin1Ev+0>:	ldr	r3, [r1]
(gdb) bt
#0  0x400fc4a0 in QString::toLatin1() const () from /usr/lib/libQtCore.so.4
#1  0x400fc718 in QString::toAscii() const () from /usr/lib/libQtCore.so.4
#2  0x448c9c58 in QNetworkSessionPrivateImpl::syncStateWithInterface() ()
   from /usr/lib/qt4/plugins/bearer/libqicdbearer.so
#3  0x41047a60 in QNetworkSession::QNetworkSession(QNetworkConfiguration const&, QObject*) () from /usr/lib/libQtNetwork.so.4
#4  0x4100b48c in ?? () from /usr/lib/libQtNetwork.so.4
#5  0x4100b48c in ?? () from /usr/lib/libQtNetwork.so.4
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb)