What were you doing when the application crashed?
I was double clicking on one of the songs found in the rythmbox:
Philip Hayes: Concerto in A major (1769) by Sonnerie from Worlds First
Piano Concertos


Distribution: Fedora release 7 (Moonshine)
Gnome Release: 2.18.2 2007-05-28 (Red Hat, Inc)
BugBuddy Version: 2.18.0

System: Linux 2.6.21-1.3228.fc7 #1 SMP Tue Jun 12 15:37:31 EDT 2007 i686
X Vendor: The X.Org Foundation
X Vendor Release: 10300000
Selinux: Enforcing
Accessibility: Disabled
GTK+ Theme: Clearlooks
Icon Theme: Fedora

Memory status: size: 248725504 vsize: 248725504 resident: 163401728 share: 25518080 rss: 163401728 rss_rlim: 4294967295
CPU usage: start_time: 1182356388 rtime: 11634 utime: 11152 stime: 482 cutime:5 cstime: 0 timeout: 0 it_real_value: 0 frequency: 100

Backtrace was generated from '/usr/bin/rhythmbox'

(no debugging symbols found)
Using host libthread_db library "/lib/libthread_db.so.1".
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread -1208501712 (LWP 2821)]
[New Thread -1341129840 (LWP 2947)]
[New Thread -1233146992 (LWP 2930)]
[New Thread -1266160752 (LWP 2837)]
[New Thread -1244447856 (LWP 2829)]
(no debugging symbols found)
0x007d1402 in __kernel_vsyscall ()

+ Trace 142456

----------- .xsession-errors (23 sec old) ---------------------
localuser:diego being added to access control list
SESSION_MANAGER=local/localhost.localdomain:/tmp/.ICE-unix/2602
** (gnome-obex-server:2818): WARNING **: OBEX server register error: -1
** (gnome-obex-server:2818): WARNING **: Unable to initialize OBEX source
** (gnome-obex-server:2818): WARNING **: Couldn't initialise OBEX listener
Windowmanager waarschuwing:Received a _NET_WM_MOVERESIZE message for 0x3400021 (Muziekspel); these messages lack timestamps and therefore suck.
** Message: don't know how to handle audio/mpeg, mpegversion=(int)1, layer=(int)3
** Message: don't know how to handle audio/mpeg, mpegversion=(int)1, layer=(int)3
rhythmbox: Python/ceval.c:2626: PyEval_EvalCodeEx: Controletest 'tstate != ((void *)0)' faalt.
sys:1: Warning: invalid uninstantiatable type `(null)' in cast to `GstGnomeVFSSrc'
--------------------------------------------------