I got this crash when disabling the composite manager for metacity under fedora core 5:

*** glibc detected *** gconf-editor: munmap_chunk(): invalid pointer: 0x09072850 ***
======= Backtrace: =========
/lib/libc.so.6(__libc_free+0x17b)[0x97351f]
/usr/lib/libglib-2.0.so.0(g_free+0x31)[0xac54d1]
gconf-editor[0x80542a4]
/usr/lib/libgobject-2.0.so.0(g_closure_invoke+0x11d)[0xc5af6d]
/usr/lib/libgobject-2.0.so.0[0xc6ba3d]
/usr/lib/libgobject-2.0.so.0(g_signal_emit_valist+0x8c7)[0xc6cf47]
/usr/lib/libgobject-2.0.so.0(g_signal_emit+0x29)[0xc6d109]
gconf-editor[0x8050a4e]
/usr/lib/libgtk-x11-2.0.so.0(gtk_cell_renderer_activate+0xb0)[0x455e500]
/usr/lib/libgtk-x11-2.0.so.0[0x46fea2b]
/usr/lib/libgtk-x11-2.0.so.0[0x46fecef]
/usr/lib/libgtk-x11-2.0.so.0[0x46fb2fa]
/usr/lib/libgtk-x11-2.0.so.0[0x46224de]
/usr/lib/libgobject-2.0.so.0[0xc597a9]
/usr/lib/libgobject-2.0.so.0(g_closure_invoke+0x11d)[0xc5af6d]
/usr/lib/libgobject-2.0.so.0[0xc6c083]
/usr/lib/libgobject-2.0.so.0(g_signal_emit_valist+0x68f)[0xc6cd0f]
/usr/lib/libgobject-2.0.so.0(g_signal_emit+0x29)[0xc6d109]
/usr/lib/libgtk-x11-2.0.so.0[0x470d028]
/usr/lib/libgtk-x11-2.0.so.0(gtk_propagate_event+0x183)[0x461bec3]
/usr/lib/libgtk-x11-2.0.so.0(gtk_main_do_event+0x317)[0x461d117]
/usr/lib/libgdk-x11-2.0.so.0[0x5c393a]
/usr/lib/libglib-2.0.so.0(g_main_context_dispatch+0x16d)[0xabe09d]
/usr/lib/libglib-2.0.so.0[0xac132f]
/usr/lib/libglib-2.0.so.0(g_main_loop_run+0x1a9)[0xac16d9]
/usr/lib/libgtk-x11-2.0.so.0(gtk_main+0xb4)[0x461d594]
gconf-editor[0x805d8fc]
/lib/libc.so.6(__libc_start_main+0xdc)[0x9217e4]
gconf-editor[0x804f531]
======= Memory map: ========
00111000-00114000 r-xp 00000000 03:05 1674965    /usr/lib/libavahi-glib.so.1.0.000114000-00115000 rwxp 00002000 03:05 1674965    /usr/lib/libavahi-glib.so.1.0.000115000-00120000 r-xp 00000000 03:05 1657934    /usr/lib/libavahi-common.so.3.3.0
00120000-00121000 rwxp 0000a000 03:05 1657934    /usr/lib/libavahi-common.so.3.3.0
00121000-00130000 r-xp 00000000 03:05 1661729    /usr/lib/libavahi-client.so.3.1.1
00130000-00131000 rwxp 0000e000 03:05 1661729    /usr/lib/libavahi-client.so.3.1.1
00131000-00137000 r-xp 00000000 03:05 1813658    /lib/librt-2.4.so
00137000-00138000 r-xp 00005000 03:05 1813658    /lib/librt-2.4.so
00138000-00139000 rwxp 00006000 03:05 1813658    /lib/librt-2.4.so
00139000-0014a000 r-xp 00000000 03:05 1813531    /lib/libnsl-2.4.so
0014a000-0014b000 r-xp 00010000 03:05 1813531    /lib/libnsl-2.4.so
0014b000-0014c000 rwxp 00011000 03:05 1813531    /lib/libnsl-2.4.so
0014c000-0014e000 rwxp 0014c000 00:00 0
0014e000-00157000 r-xp 00000000 03:05 1813535    /lib/libnss_files-2.4.so
00157000-00158000 r-xp 00008000 03:05 1813535    /lib/libnss_files-2.4.so
00158000-00159000 rwxp 00009000 03:05 1813535    /lib/libnss_files-2.4.so
00159000-0015a000 r-xp 00000000 03:05 1716534    /usr/lib/gconv/ISO8859-1.so
0015a000-0015c000 rwxp 00000000 03:05 1716534    /usr/lib/gconv/ISO8859-1.so
0015c000-0016c000 r-xp 00000000 03:05 1885646    /usr/lib/gtk-2.0/2.4.0/engines/libclearlooks.so
0016c000-0016d000 rwxp 0000f000 03:05 1885646    /usr/lib/gtk-2.0/2.4.0/engines/libclearlooks.so
0016d000-00171000 r-xp 00000000 03:05 1879201    /usr/lib/gtk-2.0/2.4.0/loaders/libpixbufloader-png.so
00171000-00172000 rwxp 00003000 03:05 1879201    /usr/lib/gtk-2.0/2.4.0/loaders/libpixbufloader-png.so
00172000-00174000 r-xp 00000000 03:05 1750278    /usr/lib/pango/1.5.0/modules/pango-basic-fc.so
00174000-00175000 rwxp 00002000 03:05 1750278    /usr/lib/pango/1.5.0/modules/pango-basic-fc.so
00176000-00178000 r-xp 00000000 03:05 1813557    /lib/libcom_err.so.2.1
00178000-00179000 rwxp 00001000 03:05 1813557    /lib/libcom_err.so.2.1
0017f000-00198000 r-xp 00000000 03:05 1813981    /lib/ld-2.4.so
00198000-00199000 r-xp 00018000 03:05 1813981    /lib/ld-2.4.so
00199000-0019a000 rwxp 00019000 03:05 1813981    /lib/ld-2.4.so
0019a000-00293000 r-xp 00000000 03:05 1662243    /usr/lib/libX11.so.6.2.0
00293000-00297000 rwxp 000f9000 03:05 1662243    /usr/lib/libX11.so.6.2.0
002a4000-002ae000 r-xp 00000000 03:05 1662236    /usr/lib/libesd.so.0.2.36
002ae000-002af000 rwxp 00009000 03:05 1662236    /usr/lib/libesd.so.0.2.36