[Trunk] Hangs when I open a score via musecore connect

When I open this score: http://musescore.com/user/17812/scores/31552 via the musescore connect panel.

Here is the gdb log. I use the latest trunk version.

#0 0xffffe424 in __kernel_vsyscall ()
#1 0x4484a0f1 in raise () from /lib/i686/libc.so.6
#2 0x4484bc1e in abort () from /lib/i686/libc.so.6
#3 0x43a36d1a in qt_message_output(QtMsgType, char const*) () from /usr/lib/libQtCore.so.4
#4 0x43a36f1f in ?? () from /usr/lib/libQtCore.so.4
#5 0x43a37038 in qFatal(char const*, ...) () from /usr/lib/libQtCore.so.4
#6 0x43a3707d in qt_assert_x(char const*, char const*, char const*, int) () from /usr/lib/libQtCore.so.4
#7 0x092ca0ee in QList::operator[] (this=0xa0defdc, i=-1)
at /usr/lib/qt4/include/QtCore/qlist.h:460
#8 0x092c9f89 in StyleData::textStyle (this=0xa0defd0, idx=TEXT_STYLE_INVALID)
at /home/collette/repositories/mscore/mscore/libmscore/style_p.h:95
#9 0x092c80fe in MStyle::textStyle (this=0xd991998, idx=TEXT_STYLE_INVALID)
at /home/collette/repositories/mscore/mscore/libmscore/style.cpp:1289
#10 0x085af0be in Score::textStyle (this=0xd9917f8, idx=TEXT_STYLE_INVALID)
at /home/collette/repositories/mscore/mscore/libmscore/score.h:635
#11 0x092dcd45 in Text::style (this=0xda06f40)
at /home/collette/repositories/mscore/mscore/libmscore/text.cpp:1018
#12 0x092d87d9 in Text::createDoc (this=0xda06f40)
at /home/collette/repositories/mscore/mscore/libmscore/text.cpp:46
#13 0x092dd2cb in Text::setStyled (this=0xda06f40, val=false)
at /home/collette/repositories/mscore/mscore/libmscore/text.cpp:1290
#14 0x092d9bf0 in Text::setTextStyle (this=0xda06f40, idx=TEXT_STYLE_INVALID)
at /home/collette/repositories/mscore/mscore/libmscore/text.cpp:330
#15 0x092da37d in Text::readProperties (this=0xda06f40, e=...)
at /home/collette/repositories/mscore/mscore/libmscore/text.cpp:460
#16 0x092d9d45 in Text::read (this=0xda06f40, e=...)