Here is a complete report from the "Problem report for" help program. Due to the ease with which this problem is recreated I havn't taken the time to install the debugsysms for the used program. And the problem can simply be avoided by clicking more slowely or simply turning on shuffle so it is impossible to click on song that just started playing.
Hopefully, this report does add something however. ** Attachment added: "Crash report file" http://librarian.launchpad.net/5063244/_usr_bin_rhythmbox.1000.crash -- Crash on fast clicking on rating in automatic playlist https://launchpad.net/bugs/71253 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs