I can confirm the same GLib-GObject-CRITICAL assertion failure with a f9/i386 system, rhythmbox-0.11.6-2.fc9.i386, and an iPod Shuffle 1G.

Exactly the same error occurs also with rhythmbox-0.11.6-2.fc9.x86_64 on a f9/x86_64 system.

This seems to be the same bug as reported in
https://bugs.launchpad.net/ubuntu/+source/libgpod/+bug/199326
where a workaround is suggested: register the iPod with iTunes, and upgrade its software.

Can you please provide a stack trace; please make sure you have debuginfo packages installed and see http://fedoraproject.org/wiki/StackTraces for more information about getting a useful stack trace. Thank you.

After I've upgraded iPod with iTunes Rhythmbox is no longer crashes.

If anyone is still running their ipod with the old firmware can you please attempt to reproduce this bug and get a full stack trace using the instructions on this website: http://fedoraproject.org/wiki/StackTraces

It seems reasonable that some people will be unable or unwilling to install itunes and therefore will still have the old ipod firmware and will run into this bug.

Well they will have to, because Fedora maintainers not using SVN version of libgpod and only way to sync, for example, podcasts on iPod nano 4th gen is to use iTunes :(

Ok, Thank you. Until we have the stack trace we are unable to debug this further. I am marking this as NEEDINFO as a request to get the stack trace when the crash occurs http://fedoraproject.org/wiki/StackTraces . If you respond, Please do not remove the NEEDINFO unless you are providing the necessary information.

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Fedora Bugzappers volunteer triage team
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Created attachment 331891 [details]
fc10 stack dump

Meanwhile, I've upgraded to fc10 and rhythmbox-0.11.6-19.r6096.fc10.x86_64 -- turns out this version (for some reason) says it wants to initialize the iPod and then promptly sigsegv's while trying to do it. Unfortunately, in spite of installing >>200MiB of debuginfo files, I am not sure if this is terribly useful as the error produced is something different :-(

Thank you for the stack trace. Setting status to ASSIGNED. However, At the moment, the Fedora developers are busy fixing other issues and may not have time to work on this one. The best way to make sure your problem will get looked on is to report it to the authors of the program. Most upstream authors use a bug tracking system like bugzilla, and more people who know the code will be looking at the bug report there.

The upstream bug tracking system to use is: http://bugzilla.gnome.org/

You are requested to add the bugzilla link here for tracking purposes.
Please make sure the bug isn't already in the upstream bug tracker
before filing it.

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Fedora Bugzappers volunteer triage team
https://fedoraproject.org/wiki/BugZappers

Created attachment 331892 [details]
fc9 stack dump

All right, on a fc9 system the originally reported error comes up:

GLib-GObject-CRITICAL **: g_type_instance_get_private: assertion `instance != NULL && instance->g_class != NULL' failed

Let's hope there is everything needed in this file. How come installing debuginfo files cause dependencies to things like a fortran library and a krb5 server?

I guess the problem happened because those devices were brand new (see http://bugzilla.gnome.org/show_bug.cgi?id=552617).

Those problems were fixed in F-10 updates and rawhide. If the problem still occurs, please run rhythmbox with "--g-fatal-warnings" so we get backtraces from the first error, not from errors afterwards when it actually falls over.

Rythmbox still fell over, bug-buddy automatically opened bug #576830 on the matter.

And this of course would be http://bugzilla.gnome.org/show_bug.cgi?id=576830 eg. a gnome bug, not a redhat bug.