rhythmbox is crashing on me after playing for a little bit on x86_64. It's also while loading my library of lots of oggs, so it could also be related to that. I'm going to start it just importing all of my oggs as I leave tonight and we'll see if it crashes then as well. Unfortunately, it's not getting caught by gnome_segv_helper and running under gdb, I just got a generic thread error and then gdb being unable to give me a backtrace. More information as I get it... (which will probably include backing down my version of gdb and trying with it also)
Is it a specific file, or any file? Is there anything printed on stdout/stderr? Are you sure you only have oggs in there? No e.g. WMA? Also, could you try running gst-launch directly like this: gst-launch gnomevfssrc location=/path/to/my/musicfile.ogg ! spider ! volume ! audioscale ! audioconvert ! $(gconftool-2 -g /system/gstreamer/default/audiosink)
Nothing obvious... I've had it happen once or twice, not with the same ogg. And it's definitely all oggs. I'll keep trying to get a better backtrace (there's all kinds of stuff printed to stdout/stderr, but most of it is because the treeview is hidden when you're updating it :)
What kind of stuff is printed to stdout/stderr? During normal operation you shouldn't see anything.
Closing this for now per your comments in-person. Please reopen if you can reproduce.