Happened while it was just sitting there. I've seen this several times.
#0 0x0000003c41430ec5 in raise () from /lib64/libc.so.6
#1 0x0000003c41432970 in abort () from /lib64/libc.so.6
#2 0x0000003c4142a11f in __assert_fail () from /lib64/libc.so.6
#3 0x0000003db224acd9 in QAbstractItemView::verticalScrollbarAction ()
from /usr/lib64/libX11.so.6
#4 0x0000003db224af13 in _XEventsQueued () from /usr/lib64/libX11.so.6
#5 0x0000003db2234e5b in XEventsQueued () from /usr/lib64/libX11.so.6
#6 0x00002aaaaacec2ac in QAbstractItemView::verticalScrollbarAction ()
from /usr/lib64/libQtGui.so.4
#7 0x0000003db4231b9e in g_main_context_check () from
/lib64/libglib-2.0.so.0
#8 0x0000003db4231f15 in QAbstractItemView::verticalScrollbarAction ()
from /lib64/libglib-2.0.so.0
#9 0x0000003db42326ce in g_main_context_iteration () from
/lib64/libglib-2.0.so.0
#10 0x00002aaaab5466c4 in QEventDispatcherGlib::processEvents () from
/usr/lib64/libQtCore.so.4
#11 0x00002aaaaacec2ff in QAbstractItemView::verticalScrollbarAction ()
from /usr/lib64/libQtGui.so.4
#12 0x00002aaaab527b98 in QEventLoop::processEvents () from
/usr/lib64/libQtCore.so.4
#13 0x00002aaaab527cad in QEventLoop::exec () from /usr/lib64/libQtCore.so.4
#14 0x00002aaaab529c31 in QCoreApplication::exec () from
/usr/lib64/libQtCore.so.4
#15 0x0000000000a8714f in lyx::frontend::GuiApplication::exec
(this=<value optimized out>) at GuiApplication.cpp:359
#16 0x00000000004d435c in lyx::LyX::exec (this=0x7fffbb15a330,
[EMAIL PROTECTED], argv=<value optimized out>) at LyX.cpp:448
#17 0x000000000042c858 in main (argc=1, argv=0x7fffbb15a438) at main.cpp:46
^done
