various actions cause emacs to seg fault.  Usually mouse clicking somewhere within the file. I am not a gdb master but I attached gdb to a running emacs process (that always died on a particular file when I clicked anywhere) and this is what it said...
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$ gdb emacs 6918
GNU gdb Red Hat Linux (5.2-2)
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This GDB was configured as "i386-redhat-linux"...
Attaching to program: /usr/bin/emacs, process 6918
Reading symbols from /usr/X11R6/lib/libXaw3d.so.7...done.
Loaded symbols for /usr/X11R6/lib/libXaw3d.so.7
Reading symbols from /usr/X11R6/lib/libXmu.so.6...done.
Loaded symbols for /usr/X11R6/lib/libXmu.so.6
Reading symbols from /usr/X11R6/lib/libXt.so.6...done.
Loaded symbols for /usr/X11R6/lib/libXt.so.6
Reading symbols from /usr/X11R6/lib/libSM.so.6...done.
Loaded symbols for /usr/X11R6/lib/libSM.so.6
Reading symbols from /usr/X11R6/lib/libICE.so.6...done.
Loaded symbols for /usr/X11R6/lib/libICE.so.6
Reading symbols from /usr/X11R6/lib/libXext.so.6...done.
Loaded symbols for /usr/X11R6/lib/libXext.so.6
Reading symbols from /usr/lib/libtiff.so.3...done.
Loaded symbols for /usr/lib/libtiff.so.3
Reading symbols from /usr/lib/libjpeg.so.62...done.
Loaded symbols for /usr/lib/libjpeg.so.62
Reading symbols from /usr/lib/libpng.so.2...done.
Loaded symbols for /usr/lib/libpng.so.2
Reading symbols from /usr/lib/libz.so.1...done.
Loaded symbols for /usr/lib/libz.so.1
Reading symbols from /lib/libm.so.6...done.
Loaded symbols for /lib/libm.so.6
Reading symbols from /usr/lib/libungif.so.4...done.
Loaded symbols for /usr/lib/libungif.so.4
Reading symbols from /usr/X11R6/lib/libXpm.so.4...done.
Loaded symbols for /usr/X11R6/lib/libXpm.so.4
Reading symbols from /usr/X11R6/lib/libX11.so.6...done.
Loaded symbols for /usr/X11R6/lib/libX11.so.6
Reading symbols from /usr/lib/libncurses.so.5...done.
Loaded symbols for /usr/lib/libncurses.so.5
Reading symbols from /lib/libc.so.6...done.
Loaded symbols for /lib/libc.so.6
---Type <return> to continue, or q <return> to quit---
Reading symbols from /lib/libdl.so.2...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /lib/ld-linux.so.2...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /lib/libnss_files.so.2...done.
Loaded symbols for /lib/libnss_files.so.2
Reading symbols from /lib/libnss_nisplus.so.2...done.
Loaded symbols for /lib/libnss_nisplus.so.2
Reading symbols from /lib/libnsl.so.1...done.
Loaded symbols for /lib/libnsl.so.1
Reading symbols from /lib/libnss_dns.so.2...done.
Loaded symbols for /lib/libnss_dns.so.2
Reading symbols from /lib/libresolv.so.2...done.
Loaded symbols for /lib/libresolv.so.2
Reading symbols from /usr/X11R6/lib/X11/locale/common/xlcDef.so.2...done.
Loaded symbols for /usr/X11R6/lib/X11/locale/common/xlcDef.so.2
Reading symbols from /usr/X11R6/lib/X11/locale/common/ximcp.so.2...done.
Loaded symbols for /usr/X11R6/lib/X11/locale/common/ximcp.so.2
Reading symbols from /usr/lib/gconv/ISO8859-1.so...done.
Loaded symbols for /usr/lib/gconv/ISO8859-1.so
Reading symbols from /usr/X11R6/lib/X11/locale/common/xomGeneric.so.2...done.
Loaded symbols for /usr/X11R6/lib/X11/locale/common/xomGeneric.so.2
0x403be3fe in select () from /lib/libc.so.6
(gdb) continue
Continuing.
<<< --- click in emacs here --- >>>
Program received signal SIGSEGV, Segmentation fault.
0x080505e4 in increment_row_positions ()
(gdb) continue
Continuing.

Program received signal SIGSEGV, Segmentation fault.
0x403100a1 in kill () from /lib/libc.so.6
(gdb) continue
Continuing.

Program terminated with signal SIGSEGV, Segmentation fault.
The program no longer exists.
(gdb) 

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I 'clicked' after the first continue (before the first SIGSEGV).  emacs itself was started as 'emacs /usr/bin/ooffice &'.  The problem does not seem to occur when emacs is not started with &, but it reoccurs when sent to the background.

Hope this information is usefull.