So, here, the first songchange is done while on the ne (I forgot to unplug the cable), then I changed songs twice, both times the program hung for a few seconds. Thanks for the help, in the meanwhile I simply uninstall avahi :)
** Attachment added: "The backtrace of rhythmbox hanging, provided by gdb." http://librarian.launchpad.net/7042391/gdb-rhythmbox.txt -- [feisty] rhythmbox hangs between songs when not connected to the internet https://launchpad.net/bugs/96153 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs