Comment 9 for bug 588155

I think this bug is the same as what's being reported here:

http://ubuntuforums.org/showthread.php?t=1575703

To summarize that thread, when multitasking for an hour or so, the gnome theme reverts to the default. It doesn't always happen, but it is happening pretty regularly to me and the other users in that thread. Opening System->Preferences->Appearances then causes the theme to change back to whatever the user had previously set it to, except for the icons (they remain set to the default theme). The following error message showed up in syslog:

gnome-settings-[1411]: segfault at 4 ip 0838396f sp bfaebdc0 error 4 in libclipboard.so[8381000+5000]

Since the settings daemon starts when the gnome session starts, I tried to do a backtrace by using Ctrl-Alt-F2, starting X on dislpay :1, and running a second gnome session under gdb. After seeing the bug behavior, I killed the session in the terminal, entered "bt" at the gdb prompt, and got the following:

(gdb)bt
#0 0x0012d422 in ?? ()
#1 0x00a16b86 in poll () from /lib/tls/i686cmov/libc.so.6
#2 0x007ac4eb in g_poll () from /lib/libglib-2.0.so.0
#3 0x0079f0ac in ?? () from /lib/libglib-2.0.so.0
#4 0x0079f817 in g_main_loop_run () from /lib/libglib-2.0.so.0
#5 0x002873c9 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#6 0x08062033 in ?? ()
#7 0x0096dbd6 in __libc_start_main () from /lib/tls/i686/cmov/libc.co.6
#8 0x08051291 in ?? ()
(gbd)

I hope this helps.